Semaphore

Suburb (SAL)

Greater Adelaide / Port Adelaide - West

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Data Sources ABSValuer GeneralRental BoardACARA Newest Oct 2026 · Refreshed ABS QuickStats SAL41329 How we calculate this
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Suburb (SAL) Boundary Analysis

This analysis uses Suburbs and Localities (SAL) boundaries, which can materially differ from Statistical Areas (SA2) even when sharing the same name.

SAL boundaries are defined by Australia Post and the Australian Bureau of Statistics to represent commonly-known suburb names used in postal addresses.

Statistical Areas (SA2) are designed for census data collection and may combine multiple suburbs or use different geographic boundaries. For comprehensive analysis, consider reviewing both boundary types if available.

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Sales ActivityProperty Sales Trends in Semaphore

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DemographicsPopulation Growth in Semaphore

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Semaphore has an estimated 2,814 residents, up from 2,749 at the 2021 Census — a change of 65 people, or 2.4%. That puts 2,655 residents on each square kilometre. Population is estimated from ABS Estimated Resident Population releases and GNAF address data, re-based from the 2021 Census and updated annually.

Detail

In the suburb of Semaphore, demographic modelling by AreaSearch incorporating broader ABS updates alongside post-Census address validations suggests an estimated count of 2,814 residents as of Aug 2026. Relative to the 2021 Census tally of 2,749 people, this represents a net addition of 65 people (2.4%). This figure builds upon AreaSearch's evaluation of the ABS Estimated Resident Population (ERP) release from June 2025 (2,810 people) along with 12 validated new addresses identified subsequently. Consequently, the suburb registers a population density of 2,654 persons per square kilometer, ranking within the top quartile of assessed Australian regions.

Net overseas migration served as the foremost catalyst, generating roughly 69.0% of recent population expansion, though interstate arrivals and natural increase also delivered positive contributions. Forward-looking population modelling for the suburb of Semaphore integrates 2024 ABS/Geoscience Australia SA2 projections based on 2022 benchmarks, supplemented for uncovered territories or horizons beyond 2032 by the 2023 SA State Government age-cohort LGA series (benchmarked to 2021) converted via weighted aggregation to SA2 boundaries. Across the 16 years leading up to 2041, aggregated SA2 figures indicate the suburb of Semaphore will expand by 227 persons (a 7.9% aggregate rise), a rate tracking just under the national statistical area median.

Frequently Asked Questions - Population

What is the latest population estimate for the suburb of Semaphore?
Total population for the suburb of Semaphore was estimated to be approximately 2,814 as at Aug 26. This is based upon an estimated resident population of 2,810 from the ABS up to June 2025.
How has the population in the suburb of Semaphore changed since 2021?
The suburb of semaphore has added approximately 65 people and shown a 2.36% increase from the 2,749 people recorded at the 2021 Census period.
What is the population density in the suburb of Semaphore?
The population density in the suburb of Semaphore is estimated at 2,654 persons per square kilometer based on the latest population estimate.
How much has the population grown over the past 10 years in the suburb of Semaphore?
Over the past 10 years, the population in the suburb of Semaphore has shown a compound annual growth rate of -0.1% per annum.
What are the main drivers of population growth in the suburb of Semaphore?
Population growth in the suburb of Semaphore is driven by: Overseas migration (69.0%), Interstate migration (22.0%), Natural increase (8.0%). The primary driver is Overseas migration, contributing 69.0% of overall population gains.

Residential SupplyHousing Development & Building Approvals in Semaphore

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Detail

According to ABS building approval figures compiled by AreaSearch, residential building activity in Semaphore has maintained a pace of roughly 3 dwellings sanctioned each year, totaling 17 approved dwellings across the 5 financial years spanning FY-21 through FY-25, including 11 approvals recorded to date in FY-25. Across that same 5 financial year period (between FY-21 and FY-25), local population growth averaged 0.8 incoming residents for every constructed dwelling, demonstrating that newly built supply comfortably matches or outpaces buyer demand and leaves room for further settlement, with new homes costing an average of $363,000 to construct.

Non-residential development has remained secondary, with $894,000 in approved commercial construction logged during the present financial year. Per capita residential development in Semaphore is particularly subdued, sitting 76.0% below the Greater Adelaide regional benchmark and trailing national norms—a pattern characteristic of an established locality facing potential town planning limits. This restricted development environment generally underpins sustained demand and values for established dwellings. Of the approvals granted, attached dwellings make up 67.0% while detached houses account for 33.0%, highlighting an evolving shift toward medium-density housing suitable for first-home buyers, investors, and downsizers. This composition contrasts noticeably with the current built form (65.0% separate houses), pointing to constrained land reserves and changing lifestyle needs. A metric of approximately 432 people per approval reinforces the mature nature of the local property sector. Latest quarterly projections from AreaSearch anticipate an increase of 223 residents across Semaphore by 2041. Should residential construction continue at prevailing low volumes, prospective dwelling completions could lag population growth, heightening buyer competition and underpinning capital appreciation.

Frequently Asked Questions - Development

How many dwelling approvals have occurred in the suburb of Semaphore recently?
Dwelling approval activity in the the suburb of Semaphore area has seen 6 residential approvals over the past two financial years, based on AreaSearch's SA2 aggregation method. The suburb of Semaphore's current population of 2,814 has been supported by 3 approvals on average over recent years.
How does the suburb of Semaphore's development activity compare to the broader region?
The suburb of Semaphore has seen 0.2 approvals per 100 people in recent years, compared to 0.74 approvals in the broader region. This means that one dwelling has been approved for every 432 people in the suburb of Semaphore, compared to one for every 122 in the broader region.
Is the suburb of Semaphore keeping up with housing demand?
With the population expected to increase by 223 people by 2041, around 112 new dwellings will be necessary. Recent approval levels may be insufficient to meet these forecasts, considering the census average of 2.0 persons per dwelling.
What has been the trend in development approvals over the past five years in the suburb of Semaphore?
Looking at development activity over the past five years, the suburb of Semaphore's approval levels have been significantly above the yearly average of 3, indicating strong recent growth in development activity.
How many dwellings will be needed to accommodate future population growth in the suburb of Semaphore?
The population in the suburb of Semaphore is expected to grow by 223 people by 2041, necessitating approximately 112 new dwellings. This calculation is based on the current census average of 2.0 persons per dwelling in the area.
How does recent development compare to population growth in the suburb of Semaphore?
Over the past five years, the suburb of Semaphore has seen 17 residential approvals while population has remained stable or declined, indicating potential market oversupply.
Are there opportunities for residential developers in the suburb of Semaphore?
With dwelling approval activity running at an average of 3 approvals per year and a population of 2,814, the market appears to be reasonably balanced between supply and demand, presenting moderate opportunities for well-positioned developments. With the population expected to increase by 223 people by 2041, around 112 new dwellings will be necessary. Current approval trends may be insufficient to meet forecast demand, indicating strong development opportunities.
Approvals Pipeline Development applications near Semaphore

Development applications around Semaphore

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SOURCE: Planning portals and council registers, compiled by AreaSearch. Distance & bearing measured from the suburb midpoint.

Project PipelineInfrastructure & Major Projects in Semaphore

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AreaSearch tracks 22 current infrastructure and development projects close to Semaphore, worth an estimated $3.97 billion. 7 are already under construction and 11 are due for completion within three years. The pipeline spans communities, precincts & urban renewal, residential development and sports & recreation. Records are compiled from Infrastructure Australia, state agencies, council planning portals and public announcements, reviewed and updated daily, then ranked by proximity, construction stage, completion horizon and project scale.

Detail

Local infrastructure investment, urban planning, and capital works play a crucial role in shaping a suburb's trajectory. Currently, no major public projects have been flagged by AreaSearch as directly impacting the immediate locality. Surrounding regional initiatives of interest include Centre St, Largs Bay, Our Port, Coast Park Linear Park - Semaphore Park to West Lakes Shore (Stage 1), and Charles Sturt Playground Renewal Program, with key surrounding developments summarized below.

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Frequently Asked Questions - Infrastructure

What are some of the major infrastructure and planning changes likely to influence the suburb of Semaphore?
Key infrastructure and planning changes likely to influence the suburb of Semaphore include: Centre St, Largs Bay (Proposed); Our Port (Construction); Coast Park Linear Park - Semaphore Park to West Lakes Shore (Stage 1) (Completed); Charles Sturt Playground Renewal Program (Construction); and The Queen Elizabeth Hospital Redevelopment Stage Three (Completed). These projects represent significant developments that will shape the area's future infrastructure landscape.
What types of infrastructure projects are impacting the suburb of Semaphore?
Infrastructure development impacting the suburb of Semaphore spans multiple sectors including Transport & Logistics, Sports & Recreation, and Residential Development, among others.
What is the scale of infrastructure investment impacting the suburb of Semaphore?
Infrastructure investment analysis indicates targeted investment in infrastructure improvements that will benefit the local area, with a notable concentration of investment within the immediate the suburb of Semaphore vicinity.
How does the suburb of Semaphore's infrastructure development compare to other areas?
Infrastructure development activity impacting the suburb of Semaphore currently ranks below national averages at the 32ndth percentile.
Quest Hotel Port Adelaide (Second Quest) and Large Retail Precinct
Category: Tourism
Stage: Construction | Est. Comp: 2026
Source / Links: Link 1   Link 2  

This significant redevelopment by One SMG (Neville Smith Group) features a second $35 million Quest Hotel apartment complex at 10-12 North Parade, providing 88-90 serviced guest suites with river views, gym, and conference facilities. Complementing the hotel is a large-format retail and commercial hub at 271 Commercial Road, spanning approximately 5,860 sqm. The precinct focuses on urban renewal, adaptive reuse of heritage elements like Customs House, and improved pedestrian connectivity to the Port River waterfront.Construction on the retail component is scheduled to commence around late 2025/early 2026 following development approval in August 2025.

Tourism

Port Civic Precinct Project
Category: Communities, Precincts & Urban Renewal
Stage: Approved | Est. Comp: 2028
Source / Links: Link 1   Link 2  

The City of Port Adelaide Enfield is redeveloping the Port Adelaide Civic Precinct into a modern cultural, community, and administrative destination. The master plan integrates flexible multi-purpose community spaces, public library facilities, council administrative offices, and upgrades surrounding the historic Town Hall. The design revitalises key civic spaces with strong environmentally sustainable principles to anchor local community activity.

Communities, Precincts & Urban Renewal

Centre Street Residential Master Plan
Category: Residential Development
Stage: Planning | Est. Comp: 2028

Redevelopment of the former public housing site on Centre Street to deliver over 600 new homes across mixed tenures. The master plan provides a diverse mix of social, affordable, and private market dwellings alongside civil infrastructure and open public space. Planning, stakeholder engagement, and initial civil delivery frameworks are being coordinated via South Australian housing authorities.

Residential Development

Dock One
Category: Communities, Precincts & Urban Renewal
Stage: Construction | Est. Comp: 2029
Source / Links: Link 1   Link 2  

Major waterfront masterplanned community at Port Adelaide by Kite Projects, incorporating Dock One stages and Dock One North. The precinct includes about 750 townhouses and apartments, landscaped waterfront promenades, park links, 23,500 sqm of green open space, a completed pedestrian bridge, a community plaza and the adaptive reuse of the former Marine and Harbours Building as a boutique hotel. Current official updates indicate Dock One North is now selling, construction is underway on the residential stages, the bridge and plaza are complete, and demolition works have commenced for the hotel component.

Communities, Precincts & Urban Renewal

West Lakes Marina Upgrade
Category: Ports, Marinas, Fisheries & Aquaculture
Stage: Under Assessment | Est. Comp: 2026
Source / Links: Link 1   Link 2  

Concept to upgrade lakeside berthing and public access infrastructure around the Aquatic Reserve at West Lakes, including additional small-craft berths, amenity upgrades to the boat launch area used by paddle sports, and foreshore improvements. No authoritative government project page found; enquiries directed to City of Charles Sturt as asset manager for West Lakes recreation facilities.

Ports, Marinas, Fisheries & Aquaculture

Our Port - Port Adelaide Urban Renewal
Category: Communities, Precincts & Urban Renewal
Stage: Construction | Est. Comp: 2030
Source / Links: Link 1   Link 2  

Renewal SA's multi-decade urban regeneration program revitalizing historic Port Adelaide into a thriving mixed-use waterfront precinct. The master plan delivers between 2,000 and 4,000 residential dwellings across key sub-precincts including Dock One, Port Approach, and McLaren Wharf. Major development stages encompass public promenades, heritage building restoration, waterfront apartments, townhouses, and new open community reserves.

Communities, Precincts & Urban Renewal

West Lakes Shore Masterplan Residential Release
Category: Residential Development
Stage: Construction | Est. Comp: 2026
Source / Links: Link 1   Link 2  

Renewal SA's West Lakes Shore residential land release is in its final delivery stages, creating around 120 waterfront residential allotments with new public open space, landscaped reserves and upgraded local infrastructure. Civil works and home construction continue across the remaining stages.

Residential Development

Customs House Precinct Revival
Category: Communities, Precincts & Urban Renewal
Stage: Under Assessment | Est. Comp: 2027
Source / Links: Link 1   

Adaptive reuse and revitalization of the historic Customs House precinct bounded by Commercial Road, Robe Street, Nile Street, and North Parade. The development encompasses function spaces, creative studios, art galleries, retail tenancies, and dining venues including an alfresco courtyard and microbrewery. Led by One SMG, the proposal integrates conserved heritage items into a connected mixed-use destination.

Communities, Precincts & Urban Renewal

Jobs & IndustryEmployment Trends in Semaphore

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1,720 residents of Semaphore are employed, from a labour force of 1,763. Unemployment sits at 2.4%, with participation at 70.0%. Weighted for its industry mix, the area's sectors are forecast to grow about 6.6% nationally over five years. That reflects industry composition only and makes no allowance for local population growth. The working-day population is estimated at 2,143, about 76% of the resident population, so more people leave the area for work than travel in. Unemployment and labour force come from ABS Small Area Labour Markets, updated quarterly; the industry and occupation profile is from the 2021 Census.

Detail

Workforce metrics compiled by AreaSearch across statistical boundaries highlight an educated local labor pool in Semaphore with robust representation in essential public services, an unemployment rate standing at only 2.4%, and annual job growth estimated at 6.6%. As of March 2026, employed residents number 1,720, with unemployment sitting 1.4% beneath the 3.8% recorded across Greater Adelaide and a solid labor force participation rate of 70.0% (exceeding the regional 66.4%). Census records also reveal that 14.4% of working locals operated from home, though pandemic-related movement restrictions should be noted. Local workers are primarily concentrated in health care & social assistance, education & training, and public administration & safety.

Specialization is most pronounced in public administration & safety, where the concentration of workers stands at 1.3 times the regional average. Conversely, construction represents just 6.7% of resident employment, trailing the 8.7% Greater Adelaide level. Comparing the Census daytime worker population to local residents indicates that this residential suburb offers relatively few jobs within its own borders. Analyses of SALM and ABS statistical data reveal that over the year ending March 2026, Semaphore recorded a 6.6% rise in employment and a 4.9% expansion in its labor force, resulting in a 1.5 percentage point drop in the jobless rate. Over the corresponding timeframe, Greater Adelaide saw employment grow by 4.2%, the labor force increase by 4.0%, and unemployment decrease by 0.2 percentage points. National projections from Jobs and Skills Australia as of Mar-26—which forecast overall employment to increase by 6.6% over five years and 13.7% over ten years across the country—provide further guidance when weighted against Semaphore's occupational structure. Extrapolating these industry trends locally indicates potential employment growth of 6.6% over five years and 13.8% over ten years (representing an illustrative weighting model that excludes localized population adjustments).

Frequently Asked Questions - Employment

What is the employment situation in the suburb of Semaphore?
As of March 2026, the suburb of Semaphore has approximately 1,720 employed residents with an unemployment rate of 2.4%. This very low unemployment rate indicates a tight labour market with strong demand for workers. The area ranks in the top 25% nationally for employment performance, indicating a robust job market.
How does the suburb of Semaphore's unemployment rate compare to the broader region?
As of March 2026, the unemployment rate in the suburb of Semaphore stands at 2.4%, which is 1.4 percentage points below Greater Adelaide's rate of 3.8%. This lower unemployment rate suggests stronger local employment conditions. For comparison, the national unemployment rate is 4.2%.
What are the major employment sectors in the suburb of Semaphore?
The employment landscape in the suburb of Semaphore is dominated by several key sectors. The largest employers are health care & social assistance (17.2% of employment), education & training (10.1%), and public administration & safety (9.9%). Other significant employers include retail trade and professional & technical.
How has employment changed recently in the suburb of Semaphore?
Over the past year to March 2026, the suburb of Semaphore has experienced employment growth, with total employment increasing while the labour force increased. As a result, the unemployment rate has fall. By comparison, Greater Adelaide saw employment increased and its unemployment rate dropped.
What is the workforce participation rate in the suburb of Semaphore?
The workforce participation rate in the suburb of Semaphore is 70.0%, which represents the proportion of working-age residents who are either employed or actively seeking work. This healthy participation rate reflects good employment opportunities and workforce engagement. The local rate leading the Greater Adelaide average of 66.4%, showing similar workforce dynamics to the broader region.
Which industries are over-represented in the suburb of Semaphore's employment market?
The suburb of semaphore shows notable specialization in public administration & safety, which employs 9.9% of the local workforce compared to 7.4% regionally. This moderate specialization indicates some local strength in the sector.
What are the employment growth prospects for the suburb of Semaphore?
Based on Jobs and Skills Australia projections applied to the suburb of Semaphore's industry mix, employment is expected to grow by 6.6% over the next five years and 13.8% over ten years. This compares to national growth expectations of 6.6% over five years. Steady growth is anticipated across multiple sectors, providing diverse employment opportunities.
How does the job market in the suburb of Semaphore compare nationally?
The suburb of semaphore's employment market shows strong performance nationally, ranking in the top 25% of areas assessed by AreaSearch. This indicates robust employment conditions and economic vitality compared to other regions. Recent job advertisement trends show the broader employment region experienced 0.7% growth, ranking 11.0th out of 37 regions nationally.
What employment opportunities exist for skilled workers in the suburb of Semaphore?
Skilled workers will find good opportunities in the suburb of Semaphore, with skilled sectors accounting for 39.7% of employment. Key sectors for skilled workers include health care & social assistance (17.2%), education & training (10.1%), and professional & technical (8.3%). With projected employment growth of 6.6% over five years, demand for skilled workers is expected to remain strong.

EarningsHousehold Income in Semaphore

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Median household income in Semaphore is $1,718 a week (about $89,000 a year), with median personal income at $857 a week. ATO records put median taxable income at $56,795 a year against an average of $67,101. Household income is from the 2021 Census; taxable income is from ATO Taxation Statistics for the latest financial year available, indexed forward using the ABS Wage Price Index.

Detail

ATO figures at the postcode scale for financial year 2023 indicate that taxpayers in Semaphore achieved a median taxable income of $56,795 and an average of $67,101, tracking close to national averages and comparable to Greater Adelaide benchmarks of $54,808 and $66,852. Factoring in subsequent Wage Price Index expansion of 10.17% since financial year 2023 yields updated March 2026 estimates of $62,571 (median) and $73,925 (average). During the 2021 Census, aggregate income indicators placed the locality near the national 54th percentile. A weekly personal income between $1,500 - 2,999 forms the largest earning band, covering 30.9% of local earners (869 residents), matching the 31.8% recorded across the surrounding region.

Residents retain 86.5% of their income after covering housing commitments, situating the area in the 6th decile of the SEIFA income index.

Frequently Asked Questions - Income

What is the median taxable income in the suburb of Semaphore?
Based on Wage Price Index adjustments to March 2026, the estimated median taxable income in the suburb of Semaphore is approximately $62,571. The official ATO data from FY-23 recorded a median of $56,795.
What is the average taxable income in the suburb of Semaphore?
Based on Wage Price Index adjustments to March 2026, the estimated average taxable income in the suburb of Semaphore is approximately $73,925. The official ATO data from FY-23 recorded an average of $67,101.
How does the median taxable income in the suburb of Semaphore compare to the region?
Based on Wage Price Index adjustments to March 2026, the estimated median taxable income in the suburb of Semaphore is approximately $62,571 compared to $60,382 in Greater Adelaide. The official ATO data from FY-23 shows $56,795 and $54,808 respectively.
How does the average taxable income in the suburb of Semaphore compare to the region?
Based on Wage Price Index adjustments to March 2026, the estimated average taxable income in the suburb of Semaphore is approximately $73,925 compared to $73,651 in Greater Adelaide. The official ATO data from FY-23 shows $67,101 and $66,852 respectively.
What are the main income cohorts in the suburb of Semaphore according to the 2021 Census?
As per the 2021 Census, the income bracket containing the largest proportion (~30.9% / 869 persons) of the suburb of Semaphore's population is the $1,500 - 2,999 cohort.
How do the main income cohorts in the suburb of Semaphore compare to the region?
The largest income cohort in the suburb of Semaphore is the $1,500 - 2,999 group, representing about 30.9% of the population. In comparison, Greater Adelaide's largest income cohort is the $1,500 - 2,999 group, representing 31.8% of its population, according to the 2021 Census.
What is the median household income in the suburb of Semaphore according to the 2021 Census?
The 2021 Census data indicates that the median household income in the suburb of Semaphore is $1,718/wk.
What is the median family income in the suburb of Semaphore according to the 2021 Census?
According to the 2021 Census, the median family income in the suburb of Semaphore is $2,362/wk.
What is the median personal income in the suburb of Semaphore according to the 2021 Census?
The 2021 Census shows that the median personal income in the suburb of Semaphore is $857/wk.
How does the suburb of Semaphore's income rank nationally?
The suburb of Semaphore's income level is in line with the national averages according to the latest ATO data aggregated by AreaSearch for FY-23. The suburb of Semaphore's median income among taxpayers is $56,795 and the average income stands at $67,101, which compares to figures for Greater Adelaide's of $54,808 and $66,852 respectively. Based on Wage Price Index growth of 10.17% since FY-23, current estimates would be approximately $62,571 (median) and $73,925 (average) as of March 2026.
What is the disposable income in the suburb of Semaphore?
The estimated disposable income in the suburb of Semaphore is $6,439 per year according to AreaSearch analysis.
How does the suburb of Semaphore's disposable income compare to the region?
The suburb of semaphore's disposable income is $6,439 compared to $5,698 for Greater Adelaide, based on AreaSearch analysis.

Housing StockHousing & Dwellings in Semaphore

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Semaphore had 1,141 occupied dwellings at the 2021 Census, 65% detached houses and 11% apartments. 34% are owned with a mortgage, 31% rented and 36% owned outright. At that Census the median rent was $320 a week and the median mortgage repayment $1,733 a month. Rent absorbs 18.6% of household income here and mortgage repayments 23.3%. Dwelling stock, tenure and housing costs are 2021 Census measures — the only source that counts dwellings at this boundary size.

Detail

The local housing stock at the time of the latest Census was composed of 65.4% standalone houses alongside 34.5% medium or high density and other dwellings, differing from the 75.2% houses and 24.9% other dwellings seen across Greater Adelaide. Outright property ownership reached 35.9%, markedly outperforming the metropolitan figure, while 33.6% of homes were held under a mortgage and 30.5% were tenanted. Monthly median mortgage costs reached $1,733, well above the Adelaide metro level of $1,562, while median weekly rent stood at $320, precisely matching the metropolitan figure of $320.

On a national scale, Semaphore's mortgage commitments fall below the Australian norm of $1,863, with rental costs tracking substantially underneath the nationwide median of $375.

Frequently Asked Questions - Housing

What percentage of homes are owned vs rented in the suburb of Semaphore?
In the suburb of Semaphore, 35.9% of homes are owned outright, 33.6% are owned with a mortgage, and 30.5% are rented.
What percentage of dwellings in the suburb of Semaphore are houses?
According to the latest data, 65.4% of dwellings in the suburb of Semaphore are houses.
What percentage of dwellings in the suburb of Semaphore are apartments or units?
In the suburb of Semaphore, 11.2% of dwellings are apartments or units, with an additional 22.9% being semi-detached dwellings.
What is the level of outright home ownership in the suburb of Semaphore?
Outright home ownership in the suburb of Semaphore stands at 35.9%, compared to 32.1% in Greater Adelaide.
What is the median monthly mortgage repayment in the suburb of Semaphore?
The median monthly mortgage repayment in the suburb of Semaphore is $1,733, compared to $1,562 in Greater Adelaide.
What is the median weekly rent in the suburb of Semaphore?
The median weekly rent in the suburb of Semaphore is $320, compared to $320 in Greater Adelaide.
What is the distribution of rental prices in the suburb of Semaphore?
In the suburb of Semaphore, 5.8% of rentals are $0-149/week, 53.2% are $150-349/week, 35.8% are $350-649/week, 5.2% are $650-949/week, and 0.0% are $950+/week.
What is the average monthly housing cost in the suburb of Semaphore?
The aggregate monthly housing cost in the suburb of Semaphore is $1,005, which represents the average monthly cost across all housing types.
What percentage of income do residents spend on housing in the suburb of Semaphore?
In the suburb of Semaphore, households with mortgages typically spend 23.3% of their income on mortgage repayments, while renters spend 18.6% of their income on rent.
How crowded are homes in the suburb of Semaphore?
The average persons per bedroom ratio in the suburb of Semaphore is 0.8, indicating the level of household density.
How does housing affordability in the suburb of Semaphore compare to the region?
Housing affordability in the suburb of Semaphore shows mortgage holders spending 23.3% of income on repayments (vs 23.3% regionally), while renters spend 18.6% of income on rent (vs 20.7% regionally).
What types of dwellings are most common in the suburb of Semaphore?
The dwelling mix in the suburb of Semaphore consists of 65.4% detached houses, 22.9% semi-detached dwellings, 11.2% apartments, and 0.4% other dwelling types.
What is the weighted average housing cost based on tenure mix in the suburb of Semaphore?
Based on the area's tenure composition, the weighted average monthly housing cost is approximately $1,005. This accounts for outright owners paying no housing costs, mortgage holders paying $1,733/month, and renters paying $1,386/month.
How affordable is housing in the suburb of Semaphore relative to local incomes?
Housing in Semaphore consumes approximately 13.5% of median household income ($7,439 monthly), indicating costs are highly affordable. The generally accepted benchmark is that housing should not exceed 30% of household income.
How do proposed developments compare to existing housing types in the suburb of Semaphore?
Recent development applications in Semaphore show attached dwellings contributing 75% of approvals compared to 35% of existing stock, while detached houses represent 25% of applications versus 65% of current dwellings. This suggests increasing densification. This area is seeing substantial increases in dwelling density compared to most Australian locations.

HouseholdsHousehold Composition in Semaphore

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Semaphore counted 1,141 households at the 2021 Census, averaging 2.2 people each. 23% are couples with children, fewer than in 77% of areas nationally, against 30% couples without children. 32% of households are people living alone, and families average 1.3 children. Household and family composition is measured only by the Census, so these are 2021 figures.

Detail

Families constitute the prevailing domestic arrangement, accounting for 65.0% of local households. This group includes couple families without children (30.0%), couples with dependent children (22.9%), and single parent homes (10.1%). Non-family living arrangements make up the remaining 35.0%, led by single-person residences at 31.8% and group households at 3.4%. With a median household size of 2.2 people, dwellings house fewer occupants than the Greater Adelaide benchmark of 2.5.

Frequently Asked Questions - Households

How many households are in the suburb of Semaphore?
As of the 2021 Census, the suburb of Semaphore had 1,141 households. Based on population growth patterns, this has grown by approximately 2.4% to an estimated 1,168 households today.
What is the typical household size?
The median household size in the suburb of Semaphore is 2.2 people. This compares to 2.5 in Greater Adelaide and reflects the area's household composition mix.
What types of households are most common?
Family households dominate at 65.0% of all households. The remaining households consist of lone person households (31.8%), group households (3.4%), and other household types (0.2%).
How are families structured in the area?
Among the 741 family households, 22.9% are couples with children, 30.0% are couples without children at home, and 10.1% are single parent families. This mix shapes local demand for schools, family services, and housing types.
How does the suburb of Semaphore compare to regional household patterns?
Compared to Greater Adelaide, the suburb of Semaphore shows distinct household patterns. This higher proportion of single-person households drives demand for smaller dwellings and different community services.
What is the average family size?
Families in the suburb of Semaphore have an average of 1.3 children, slightly below the Greater Adelaide average of 1.5. This influences local demand for child-related services and larger family homes.
What are the marriage patterns in the suburb of Semaphore?
Marriage patterns reveal 41.3% of the adult population are currently married, while 38.8% have never married. This compares to 45.7% married and 36.4% never married across Greater Adelaide.
How significant are single-person households?
Single-person households represent 31.8% of all households in the suburb of Semaphore, similar to the regional average of 27.7%. This affects demand for smaller dwellings and single-person accommodation.
Are shared living arrangements common?
Group households (unrelated people sharing) account for 3.4% of households, well below the Greater Adelaide average of 3.7%. This low rate suggests limited student or young professional shared accommodation.
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EducationSchools & Education in Semaphore

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33.2% of adults in Semaphore hold a university qualification, including 20.2% with a bachelor degree and 8.9% with postgraduate qualifications. A further 22.7% hold a vocational qualification. 1 school serves the area, with 203 enrolment places and an average ICSEA of 1,041 against a national benchmark of 1,000. Qualifications come from the 2021 Census; school enrolments, ICSEA and results come from ACARA's current release.

Detail

Higher education qualifications are exceptionally prevalent in Semaphore, where 33.2% of persons aged 15+ hold a tertiary degree—far outpacing the SA3 area rate of 22.6% and the statewide figure of 25.7%. Among degree holders, bachelor qualifications represent 20.2%, postgraduate credentials comprise 8.9%, and graduate diplomas account for 4.1%. In parallel, technical and vocational training is strongly established, with 34.5% of the population aged 15+ holding trade credentials, consisting of 11.8% with advanced diplomas and 22.7% holding certificates. Formal study engages 24.3% of local residents, distributed across primary schools (7.7%), tertiary institutions (6.5%), and secondary education programs (5.6%).

Frequently Asked Questions - Education

What percentage of people in the suburb of Semaphore have university qualifications?
33.2% of people aged 15 and over in the suburb of Semaphore have university qualifications, compared to 28.9% in the broader region.
What percentage of people in the suburb of Semaphore have no formal qualifications?
32.3% of people aged 15 and over in the suburb of Semaphore have no formal qualifications, compared to 39.0% regionally.
How does the suburb of Semaphore's education level compare to national averages?
The suburb of semaphore ranks in the 64th percentile nationally for education based on AreaSearch's analysis of qualification and performance metrics.
What types of qualifications are most common in the suburb of Semaphore?
The most common qualifications in the suburb of Semaphore are: Certificate (22.7%), Bachelor Degree (20.2%), Advanced Diploma (11.8%).
What proportion of the suburb of Semaphore's population is currently attending educational institutions?
24.3% of the population in the suburb of Semaphore is currently engaged in formal education, with 7.7% in primary school, 5.6% in secondary school, 6.5% at university.
What is the ICSEA score for schools in the suburb of Semaphore?
The average ICSEA (Index of Community Socio-Educational Advantage) score for schools in the suburb of Semaphore is 1041, indicating average socio-educational advantage (national average is 1000).
How many schools are located within the suburb of Semaphore?
There are 1 schools within the suburb of Semaphore, with a combined enrollment of approximately 203 students.
What types of schools are available in the suburb of Semaphore?
The suburb of semaphore includes 1 primary school.

Schools Detail

AmenitiesServices & Amenities in Semaphore

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Getting AroundTransport & Commuting in Semaphore

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Public transport in Semaphore reaches 14 stops on 10 routes, timetabled for about 250 services a week. The typical home sits about 170 m from its nearest stop. Households keep an average of 1.2 vehicles. Stop and service counts are built from operators' published GTFS timetables and refresh with each timetable release; vehicle ownership is from the 2021 Census.

Detail

Public transit infrastructure in Semaphore features 14 active bus stops connected by 10 individual bus routes, providing 245 weekly scheduled trips. Commuter accessibility is notably strong, with residents living an average of 167 meters from their nearest transit point. Given the predominantly residential character of the suburb, outbound travel predominates: private vehicles account for 87% of commutes, while 2% travel by bicycle. Dwellings maintain an average of 1.2 vehicles, lower than the broader metropolitan standard, while 14.4% of workers conducted their duties from home according to the 2021 Census (under potential COVID-19 influences).

Transit service across all routes provides an average frequency of 35 trips per day, translating to roughly 17 weekly trips at each active stop.

Frequently Asked Questions - Transport

How many public transport stops are in Semaphore?
There are 14 public transport stops within the suburb of Semaphore.
How frequent are the transport services in Semaphore?
the suburb of Semaphore has 245 weekly trips across 10 routes, averaging 35 trips per day.
How far are residents from public transport in Semaphore?
On average, residential properties are 167 meters from the nearest transport stop.

Transport Stops Detail

HealthcareHealth Services in Semaphore

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62.5% of residents in Semaphore report no long-term health condition. 7.1% need daily assistance with core activities, and 53.5% hold private health cover. The standardised death rate runs at 4.5 per 1,000 residents. Health conditions, assistance needs and insurance are 2021 Census measures; the death rate comes from current ABS releases.

Detail

Health assessments by AreaSearch evaluating long-term illnesses and mortality patterns reflect lower-than-average outcomes for Semaphore. Although chronic condition rates across the broader community align with standard levels, they are elevated among older residents. Meanwhile, private health insurance coverage sits just ahead of typical SA2 benchmarks, encompassing approximately 54% of residents (~1,506 people). Mental health conditions and arthritis represent the most prevalent diagnoses, affecting 10.0 and 9.0% of the local population, whereas 62.5% of residents reported having no diagnosed chronic medical conditions compared to 67.9% across Greater Adelaide. Health challenges are notably evident within working-age cohorts.

Senior citizens aged 65 and over constitute 22.7% of the locality (638 people), surpassing the Greater Adelaide proportion of 19.1%, with health measures among the aged population presenting challenges despite comparing relatively better on a national scale.

Frequently Asked Questions - Health

How many people in the suburb of Semaphore have private health insurance?
Around 53.5% of people in the suburb of Semaphore are covered by private health insurance, which compares to 52.7% in the broader region of Greater Adelaide.
What percentage of the population requires ongoing medical assistance in the suburb of Semaphore?
In the suburb of Semaphore, 7.1% of the population is identified as requiring ongoing medical assistance. This figure is slightly different from the regional average, where 6.6% of people in Greater Adelaide require similar assistance.
How prevalent is asthma in the suburb of Semaphore?
8.9% of people in the suburb of Semaphore are diagnosed with asthma. In comparison, 7.7% of the population across Greater Adelaide is affected by asthma.
What percentage of people have diabetes in the suburb of Semaphore?
Diabetes affects 4.3% of the the suburb of Semaphore population, while in the surrounding region, 4.8% of people are diagnosed with diabetes.
What is the percentage of people with heart disease in the suburb of Semaphore?
3.8% of people in the suburb of Semaphore have heart disease. Across the region of Greater Adelaide, 3.8% of the population is affected by heart disease.
How does the suburb of Semaphore compare to the region in terms of overall private health coverage?
In the suburb of Semaphore, 53.5% of the population are estimated to have private health insurance. Comparatively, Greater Adelaide sees an estimated private health coverage rate of 52.7%.

Ancestry & LanguageCultural Diversity in Semaphore

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Semaphore is largely Australian-born, at 77.0% of residents, with 8.5% speaking a language other than English at home. The largest reported ancestries are English (30.9%) and Australian (21.9%). Ancestry, language and country of birth are counted only by the Census, so these are 2021 figures.

Detail

Cultural and demographic indicators in Semaphore broadly mirror regional averages, with Australian-born citizens comprising 77.0% of residents, 88.9% holding Australian citizenship, and 91.5% speaking exclusively English at home. Christianity represents the most widely practiced faith at 39.7% of the community. In contrast, Islamic affiliation is recorded at 1.2%, sitting beneath the 3.0% observed across Greater Adelaide. Ancestry records show that the most common parental origins among residents are English (30.9%), Australian (21.9%), and Irish (9.1%). Other European ancestries exhibit elevated local representation relative to the wider region, including Polish at 1.3% (vs 1.0%), German at 6.0% (vs 5.1%), and Dutch at 2.0% (vs 1.2%).

Frequently Asked Questions - Diversity

What is the level of cultural diversity in the suburb of Semaphore?
Semaphore was found to be roughly in line with the wider region's average in terms of cultural diversity, with 77.0% of its population born in Australia, 88.9% being citizens, and 91.5% speaking English only at home.
What is the most common religion in the suburb of Semaphore?
The main religion in Semaphore was found to be Christianity, which makes up 39.7% of people in Semaphore. However, the most apparent overrepresentation was in Islam, which comprises 1.2% of the population, compared to 3.0% across Greater Adelaide.
What are the top countries of origin in the suburb of Semaphore?
In terms of ancestry (country of birth of parents), the top three represented groups in Semaphore are English, comprising 30.9% of the population, Australian, comprising 21.9% of the population, and Irish, comprising 9.1% of the population. Additionally, there are notable divergences in the representation of certain other ethnic groups: Polish is notably overrepresented at 1.3% of Semaphore (vs 1.0% regionally), German at 6.0% (vs 5.1%) and Dutch at 2.0% (vs 1.2%).
How does the percentage of people born overseas compare to the regional average?
23.0% of the the suburb of Semaphore population was born overseas, compared to 28.7% regionally.
What percentage of the the suburb of Semaphore population speaks a language other than English at home?
8.5% of the population in the suburb of Semaphore speaks a language other than English at home, compared to 22.2% in the wider region.
How many people in the suburb of Semaphore identify as Australian Aboriginal?
1.4% of the the suburb of Semaphore population identifies as Australian Aboriginal, compared to 1.2% in the region.
What is the citizenship status of the population in the suburb of Semaphore?
88.9% of the the suburb of Semaphore population holds citizenship, compared to 86.3% in the wider region.

Age StructureAge Profile of Semaphore

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The median resident of Semaphore is 50, older than 91% of areas nationally. 19.6% of residents are aged 15 to 34. Age cohorts are not raw Census counts: the Census split is re-based to the latest ABS population estimates and state projections.

Detail

Semaphore exhibits an older demographic profile leaning toward mature households. Cohorts aged 45 - 64 make up 35.1% of the population as at August 2026, compared to 23.0% regionally, while youth aged 0 - 24 represent 20.8% against a 29.0% Greater Adelaide share. The estimated median age stands at 50 as at August 2026, holding steady from the 2021 Census and exceeding both the Greater Adelaide median of 39 and the Australian median of 38 recorded at that Census. The most noticeable demographic shift since 2021 has been the reduction in the 45 - 64 age bracket from 38.6% down to 35.1%.

Projections to 2041 indicate senior cohorts aged 65+ will drive future growth, gaining 183 residents (29%) to reach 822 individuals, while younger adult and youth segments are forecast to decrease.

Frequently Asked Questions - Age

What is the median age in the suburb of Semaphore?
AreaSearch estimates the median age in the suburb of Semaphore at 50 years as at August 2026. That is in line with the 2021 Census figure of 50 years, on an age profile AreaSearch re-estimates for population change recorded since the Census.
How does the suburb of Semaphore's median age compare to broader areas?
At an estimated 50 years as at August 2026, Semaphore is 11 years older than the Greater Adelaide 2021 Census average (39 years) and 12 years older than the national Census average (38 years).
What age groups are over-represented in the suburb of Semaphore?
On AreaSearch estimates updated to August 2026, the most over-represented age group in the suburb of Semaphore compared to the Greater Adelaide region is the 55 - 64 group, making up 20.5% of the population.
What age groups are under-represented in the suburb of Semaphore?
On AreaSearch estimates updated to August 2026, the most under-represented age group in the suburb of Semaphore compared to the Greater Adelaide region is the 25 - 34 group, making up 10.1% of the population.
Are there age groups with notable population variances?
Yes, certain age groups in the suburb of Semaphore show significant variance compared to the Greater Adelaide region. The most over-represented age groups are 55-64 year-olds (20.5% vs 11.3%) and 65-74 year-olds (14.4% vs 9.8%). The most under-represented age groups are 85+ year-olds (1.3% vs 2.6%) and 0-4 year-olds (3.0% vs 5.2%).
What is the percentage of children (0-14 years) in the suburb of Semaphore?
AreaSearch estimates children aged 0-14 years at 11.3% of the population in the suburb of Semaphore as at August 2026.
What is the percentage of older people (65+ years) in the suburb of Semaphore?
AreaSearch estimates people aged 65 and over at 22.7% of the population in the suburb of Semaphore as at August 2026.

Data & MethodBoundaries, Sources & Method for Semaphore

Data currency Refreshed

9 of 14 data sections on this page were updated within the last 12 months — the newest current to Oct 2026.

Everything is aggregated to the Suburb (SAL) boundary shown above, on a 2021 Census baseline. Only 3 sections — housing, households and cultural diversity — still wait on the 2026 Census.

The ledger — source, cycle and currency by section

Section Source & update cycle Currency
Updated within the last 12 months 9 sections
Population ABS, GNAF, Geoscience Australia Annual (ABS ERP) Aug 2026 2 months ago headline measures · 2021 Census baseline
Re-based to the ABS Estimated Resident Population (June 2025 release) and updated with new dwellings from GNAF address data. Current to Aug 2026, with the 2021 Census supplying the small-area baseline.
Age profile ABS, Geoscience Australia, State governments Annual Aug 2026 2 months ago headline measures · 2021 Census baseline
Age cohorts are re-based to the latest ABS population estimates and state projections, current to Aug 2026. Each cohort is held as a Census baseline and a current estimate.
Development & approvals ABS, GNAF Monthly (ABS approvals) Aug 2026 2 months ago headline measures · Jul 2026 baseline
Property sales & rents Valuer General, Rental Board, ABS Weekly sales, quarterly rents Oct 2026 this month headline measures · Sep 2026 baseline
Sales from the state Valuer General register, refreshed weekly, and rents from quarterly rental bond lodgements. Both are read live each time this page loads, current to Oct 2026.
Infrastructure projects Infrastructure Australia, Local governments Daily May 2026 5 months ago all 2 projects tracked here
Project pipeline maintained continuously from Infrastructure Australia, state agencies, local government and public announcements. Records are added and revised daily; this area was last updated May 2026.
Employment ABS, DEWR, JSA Quarterly (ABS SALM) Mar 2026 7 months ago headline measures · 2021 Census baseline
Unemployment and labour force from ABS Small Area Labour Markets, current to Mar 2026. The growth outlook applies Department of Employment (now Jobs and Skills Australia) forecasts for all 19 industry divisions to the local industry mix, so it measures sector composition rather than local expansion and makes no allowance for population growth. Job demand comes from the same agency via its Internet Vacancy Index; industry and occupation structure from the 2021 Census.
Education ABS, ACARA Annual (ACARA) Sep 2026 last month headline measures · 2021 Census baseline
Transport ABS, State Transport Departments Each timetable release Jul 2026 3 months ago headline measures · 2021 Census baseline
Services & amenities Provider directories, ACECQA Continuous Sep 2026 last month all 14 measures
Annual and financial-year sources 2 sections
Income ABS, ATO Annual (ATO) FY 2023 3 years ago headline measures · 2021 Census baseline
ATO taxable income statistics for FY 2023, indexed forward using the Wage Price Index. Census household income provides the distribution detail.
Health ABS, ATO Annual 2024 2 years ago headline measures · 2021 Census baseline
Census-measured — next update: 2026 Census 3 sections No more current small-area source exists for these, so they are labelled as Census-measured rather than implied to be current.
Housing ABS 5-yearly (Census) 2021 Census next update 2026 all 30 measures
Households ABS 5-yearly (Census) 2021 Census next update 2026 all 18 measures
Cultural diversity ABS, Geoscience Australia 5-yearly (Census) 2021 Census next update 2026 all 44 measures

"Currency" is the most recent release feeding that section. Where the Census supplies the structural baseline underneath a current headline figure, the row says so.

How the numbers are built

Population

The Census provides the small-area baseline, aggregated from mesh blocks to this boundary. It is then re-based to the ABS Estimated Resident Population (June 2025 release), and new dwellings built since Census night are counted from address data — 12 validated new addresses here. The headline figure is therefore a current estimate for Aug 2026, not a 2021 count (2,749 at the 2021 Census → 2,814 now). Annual growth rates are compound (CAGR), not simple averages.

Age profile

Cohort shares are not raw Census counts. Every cohort is held as a pair — the Census baseline and a current estimate — and the split is re-based using ERP and state population projections, current to Aug 2026. Median age is the Census median plus modelled change since. Charts that show both are labelled "2021 Census vs Current Estimate".

Property sales

Sourced from the state valuation authority's sales register — current, not Census, and refreshed weekly. Medians are calculated from settled transactions in the period shown; periods with very low transaction counts are flagged or suppressed, because a handful of sales can move a median substantially.

Rents

Derived from state rental bond lodgement data, by dwelling type and bedroom count. Bonds are lodged at the start of a new tenancy, so this reflects new lettings, not the whole rented stock.

Development & infrastructure

Building approvals come from current ABS releases; development applications are collected from council and state planning portals; the infrastructure pipeline is compiled from Infrastructure Australia and local government sources. Applications are matched to this boundary by address or coordinates, so very recent lodgements may not yet appear.

Employment & income

Industry and occupation structure comes from the Census, but the headline labour-market indicators do not. Unemployment and labour force are derived from ABS Small Area Labour Markets (quarterly). The employment outlook applies Department of Employment forecasts for all 19 industry divisions to this area's own industry mix (the agency is now Jobs and Skills Australia), as does the Internet Vacancy Index used for job demand. Because it is weighted on industry composition alone, that outlook carries no allowance for local population growth — in fast-growing areas the real rise in local jobs will typically be higher. Income combines Census household income with ATO taxable-income statistics for FY 2023, indexed forward using the Wage Price Index.

Education, transport & amenities

School enrolments, ICSEA and performance come from ACARA's current release, not the Census. Public transport stops and service frequency are derived from GTFS timetable feeds published by state transport departments. Services and amenities are proximity and count scores built from provider directories, refreshed on their own cycle. The Census contributes only the travel-to-work and qualification measures.

Rankings and benchmarks. Where we rank this area, the comparison set is every area of the same boundary type — suburbs against suburbs, SA2s against SA2s. Benchmarks compare this area against its greater capital city region and the national figure for the same measure and period.

Limits worth knowing. Small areas carry larger error margins, and the ABS introduces small random adjustments to Census counts to protect confidentiality — so totals may not sum exactly. Estimates re-based from regional data describe the area's expected trajectory, not a direct count of it. Figures are indicative for research and are not financial, planning or valuation advice.

Cross-check us. The Census baseline for this boundary is at ABS 2021 Census QuickStats (SAL41329). QuickStats reports 2021 only — the figures on this page are more current wherever the ledger shows a later date.

Common questions about this page

How do Semaphore suburb boundaries differ from Statistical Areas?
This page uses Suburbs and Localities (SAL) boundaries (suburb-style geography). SAL represents commonly-known suburb names used in addresses, while Statistical Areas (SA2) are designed for census/statistical reporting. Even when sharing the same name, SAL and SA2 boundaries often cover different geographic areas with different populations.
Where does the data on this Semaphore page come from?
AreaSearch compiles this page from official and industry sources — including ABS, Geoscience Australia, Valuer General, Provider directories, DEWR, JSA, State Transport Departments and ACARA — then aggregates them to the boundary shown and calculates the rankings, growth rates and benchmarks itself. Property sales come from the state valuation authority, rents from state rental bond lodgements, development applications from council and state planning portals, school data from ACARA, and public transport from state transport departments.
Is the Semaphore data on this page just from the 2021 Census?
No. Most of this page is maintained well beyond the Census. Sourced entirely from current releases: development & approvals (Aug 2026), property sales & rents (Oct 2026), infrastructure projects (May 2026) and services & amenities (Sep 2026). Built on a Census baseline but carrying newer measures on top: population (to Aug 2026), age profile (to Aug 2026), employment (to Mar 2026), income (to FY 2023), education (to Sep 2026), transport (to Jul 2026) and health (to 2024). Population and age cohorts in particular are re-based to the latest ABS Estimated Resident Population rather than left at 2021 counts. Only housing, households and cultural diversity remain wholly Census-based, because no more current small-area dataset exists for those measures.

Nearby Areas