Semaphore Park

Semaphore Park has seen population growth performance typically on par with national averages when looking at short and medium term trends

The population of Semaphore Park, as estimated by AreaSearch using ABS updates and new addresses validated since November 2025, is around 4,742. This figure represents an increase of 201 people from the 2021 Census count of 4,541, reflecting a growth rate of 4.4%. The estimated resident population (ERP) of Semaphore Park was 4,674 in June 2024, according to AreaSearch's analysis of ABS ERP data and additional validated new addresses since the Census date. This results in a population density ratio of approximately 2,482 persons per square kilometer for Semaphore Park, placing it among the upper quartile of locations assessed by AreaSearch nationwide. Semaphore Park's growth rate since the census is within 2.7 percentage points of the state average (7.1%), indicating strong growth fundamentals. Overseas migration contributed approximately 54% to overall population gains in recent periods.

AreaSearch employs ABS/Geoscience Australia projections for each SA2 area, released in June 2024 with a base year of 2022. For areas not covered by this data and years post-2032, AreaSearch adopts the SA State Government's Regional/LGA projections by age category, released in 2023 based on 2021 data, with adjustments made using weighted aggregation methods from LGA to SA2 levels. Based on these projected demographic shifts, Semaphore Park is expected to experience above-median population growth among statistical areas analyzed by AreaSearch. By 2041, the suburb's population is projected to increase by 787 persons, reflecting a total growth rate of 16.1% over the 17-year period.

Residential development activity is slightly higher than average within Semaphore Park when compared nationally

Semaphore Park saw approximately 28 new homes approved annually over the past five financial years, totalling around 143 homes. As of FY-26, there have been 5 approvals recorded so far. On average, 1.5 new residents arrived per year for each new home between FY-21 and FY-25, indicating balanced supply and demand with stable market conditions. The average construction value was $510,000, higher than regional levels, suggesting an emphasis on quality construction.

This financial year has seen $12.3 million in commercial approvals, showing steady commercial investment activity. Compared to Greater Adelaide, Semaphore Park had around three-quarters the rate of new dwelling approvals per person and ranked among the 72nd percentile nationally. Recent construction comprised 62% detached houses and 38% medium and high-density housing, offering choices across price ranges.

Semaphore Park reflects a low density area with approximately 174 people per approval. Population forecasts indicate it will gain around 762 residents by 2041. Current development appears well-matched to future needs, supporting steady market conditions without extreme price pressure.

Semaphore Park has strong levels of nearby infrastructure activity, ranking in the top 30% nationally

Changes in local infrastructure significantly impact an area's performance. AreaSearch has identified seven projects likely to affect this region. Notable ones are West Lakes Shore Masterplan Residential Release, Novo West Lakes Stage 2, West Lakes Marina Upgrade, and West Lakes Sports Complex Upgrade. The following list details those most relevant:.

Professional plan users can use the search below to filter and access additional projects.

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Employment performance in Semaphore Park has been below expectations when compared to most other areas nationally

Semaphore Park has a skilled workforce with essential services sectors well represented. The unemployment rate was 5.4% in the past year, with an estimated employment growth of 2.6%.

As of June 2025, 2,231 residents are employed while the unemployment rate is 1.4% higher than Greater Adelaide's rate of 4.0%. Workforce participation in Semaphore Park lags behind Greater Adelaide at 52.4% compared to 61.7%. Leading employment industries among residents include health care & social assistance, construction, and education & training. Notably, construction has a high concentration with employment levels at 1.2 times the regional average.

However, health care & social assistance has limited presence at 15.1% compared to the regional average of 17.7%. The area appears to offer limited local employment opportunities, as indicated by the count of Census working population versus resident population. Over a 12-month period ending in June 2025, employment increased by 2.6%, while the labour force grew by 3.1%, resulting in an unemployment rise of 0.4 percentage points. In contrast, Greater Adelaide saw employment and labour force growth of 2.1% each, with a marginal increase in unemployment. Jobs and Skills Australia's national employment forecasts from Sep-22 project national employment to expand by 6.6% over five years and 13.7% over ten years. Applying these projections to Semaphore Park's employment mix suggests local employment should increase by 6.4% over five years and 13.4% over ten years, based on a simple weighting extrapolation for illustrative purposes.

Income figures position the area below 75% of locations analysed nationally by AreaSearch

AreaSearch's data for financial year 2022 shows median income in Semaphore Park at $46,765 and average income at $62,382. These figures are below the national averages of $52,592 (median) and $64,886 (average) for Greater Adelaide. By September 2025, with a 12.83% increase based on Wage Price Index growth, estimated median income in Semaphore Park would be approximately $52,765 and average income around $70,386. The 2021 Census reveals that incomes in Semaphore Park fall between the 17th and 20th percentiles nationally for households, families, and individuals. Income brackets show 25.8% of Semaphore Park's population (1,223 individuals) earn within the $1,500 - $2,999 range, similar to the surrounding region at 31.8%. Housing affordability is severe, with only 82.4% of income remaining, ranking at the 17th percentile nationally. Semaphore Park's SEIFA income ranking places it in the 4th decile.

Semaphore Park displays a diverse mix of dwelling types, with a higher proportion of rental properties than the broader region

Semaphore Park's dwellings, as per the latest Census evaluation, consisted of 54.0% houses and 46.0% other dwellings (semi-detached, apartments, 'other' dwellings), compared to Adelaide metro's 66.1% houses and 33.9% other dwellings. Home ownership in Semaphore Park was at 30.9%, with mortgaged dwellings at 30.2% and rented ones at 38.9%. The median monthly mortgage repayment was $1,786, higher than Adelaide metro's average of $1,733. The median weekly rent was $250, lower than Adelaide metro's $325. Nationally, Semaphore Park's mortgage repayments were below the Australian average of $1,863, and rents were substantially lower than the national figure of $375.

Semaphore Park features high concentrations of lone person households, with a lower-than-average median household size

Family households account for 60.9% of all households, including 22.1% couples with children, 24.5% couples without children, and 13.2% single parent families. Non-family households constitute the remaining 39.1%, with lone person households at 36.4% and group households comprising 2.6%. The median household size is 2.2 people, which is smaller than the Greater Adelaide average of 2.4.

Semaphore Park shows below-average educational performance compared to national benchmarks, though pockets of achievement exist

Semaphore Park's educational qualifications trail regional benchmarks; 22.1% of residents aged 15+ hold university degrees compared to Australia's 30.4%. This gap indicates potential for educational development and skills enhancement. Bachelor degrees are the most common (15.9%), followed by postgraduate qualifications (4.2%) and graduate diplomas (2.0%). Vocational credentials are prominent, with 35.7% of residents aged 15+ holding them; advanced diplomas account for 10.3%, certificates for 25.4%.

Educational participation is high, with 25.0% currently enrolled in formal education: 9.2% in primary, 6.0% in secondary, and 4.6% in tertiary education. Westport Primary School serves Semaphore Park, enrolling 402 students as of a typical Australian school condition (ICSEA: 1021). It focuses exclusively on primary education; secondary options are available nearby. School places per 100 residents stand at 8.5, below the regional average of 13.6, suggesting some students attend schools in adjacent areas.

Transport servicing is moderate compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility

Semaphore Park has 25 active public transport stops, all of which are bus stops. These stops are served by 14 different routes that together facilitate 658 weekly passenger trips. The park's residents enjoy excellent transport accessibility, with an average distance of 155 meters to the nearest stop.

On average, there are 94 daily trips across all routes, equating to about 26 weekly trips per individual stop.

Health performance in Semaphore Park is well below average with prevalence of common health conditions notable across both younger and older age cohorts

Semaphore Park faces significant health challenges, with common conditions prevalent across both younger and older age groups.

Private health cover stands at approximately 52%, slightly lower than the average SA2 area's rate of around 60%. The most frequent medical conditions are arthritis (10.9% of residents) and mental health issues (9.6%). Conversely, 60.7% of residents report no medical ailments, compared to 68.9% in Greater Adelaide. Seniors aged 65 and over comprise 26.6% (1,261 people) of the population, higher than Greater Adelaide's 20%. Despite this, health outcomes among seniors perform better than those of the general population.

In terms of cultural diversity, Semaphore Park records figures broadly comparable to the national average, as found in AreaSearch's assessment of a number of language and cultural background related metrics

Semaphore Park's cultural diversity aligns with the broader area, as shown by its population born in Australia (79.2%), citizens (88.8%), and English-only speakers at home (89.3%). Christianity is the predominant religion, practiced by 46.0% of Semaphore Park residents. Notably, Islam's representation is higher than average, comprising 1.2% compared to Greater Adelaide's 2.8%.

The top three ancestral groups are English (30.2%), Australian (24.9%), and Irish (7.9%), each exceeding regional averages. Polish (1.7%), Russian (0.7%), and Welsh (0.8%) ethnicities also show notable overrepresentation compared to the wider region.

Semaphore Park hosts an older demographic, ranking in the top quartile nationwide

Semaphore Park's median age is 46 years, significantly higher than Greater Adelaide's average of 39 years, which is also older than Australia's median age of 38 years. The age profile shows that those aged 75-84 are particularly prominent, making up 9.9% of the population, while those aged 15-24 are relatively smaller at 9.3%. Between 2021 and the present day, the proportion of those aged 75-84 has increased from 7.5% to 9.9%, while the 55-64 age group has decreased from 13.4% to 11.9% and the 65-74 age group has dropped from 13.8% to 12.3%. By 2041, population forecasts indicate significant demographic changes in Semaphore Park, with the strongest growth projected for those aged 85 and above, who are expected to increase by 127%, adding 265 residents to reach a total of 474. Residents aged 65 and above will drive 62% of population growth, reflecting demographic aging trends. Conversely, population declines are projected for those aged 65-74 and those aged 0-4.