Semaphore Park

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

Based on AreaSearch's analysis of ABS population updates for the broader area, as of November 2025, Semaphore Park's estimated population is around 4,870. This reflects an increase of 329 people (7.2%) since the 2021 Census, which reported a population of 4,541 people in the Semaphore Park statistical area (Lv2). AreaSearch inferred this change from the resident population of 4,620, estimated following examination of the latest ERP data release by the ABS in June 2024, and an additional 25 validated new addresses since the Census date. This level of population equates to a density ratio of 2,549 persons per square kilometer, placing Semaphore Park (SA2) in the upper quartile relative to national locations assessed by AreaSearch. Semaphore Park's 7.2% growth since census positions it within 1.5 percentage points of the state (8.7%), demonstrating competitive growth fundamentals. Population growth for the area was primarily driven by overseas migration, contributing approximately 54.0% of overall population gains during recent periods.

AreaSearch adopts ABS/Geoscience Australia projections for each SA2 area, released in 2024 with a base year of 2022. For areas not covered and years post-2032, the SA State Government's Regional/LGA projections by age category are adopted, based on 2021 data and released in 2023, with adjustments made employing a method of weighted aggregation of population growth from LGA to SA2 levels. Considering these projected demographic shifts, an above median population growth is projected for the Semaphore Park (SA2), expected to grow by 783 persons to 2041 based on aggregated SA2-level projections, reflecting an increase of 12.9% in total over the 17 years.

AreaSearch analysis of residential development drivers sees Semaphore Park recording a relatively average level of approval activity when compared to local markets analysed countrywide

Based on AreaSearch analysis of ABS building approval numbers allocated from statistical area data, Semaphore Park has seen around 29 new homes approved each year over the past five financial years. This totals an estimated 145 homes between FY-21 and FY-25. As of FY-26, 33 approvals have been recorded. On average, 1.5 new residents arrive per new home each year in Semaphore Park, indicating a balanced supply and demand creating stable market conditions.

The average construction value of new properties is $510,000, suggesting developers focus on the premium market with high-end developments. This financial year has seen $15.3 million in commercial approvals, reflecting steady commercial investment activity. Compared to Greater Adelaide, Semaphore Park has about three-quarters the rate of new dwelling approvals per person and ranks among the 67th percentile nationally.

Recent construction comprises 64.0% detached houses and 36.0% medium and high-density housing, offering choices across price ranges from spacious family homes to compact options. Semaphore Park reflects a developing area with around 204 people per approval. Population forecasts indicate Semaphore Park will gain approximately 630 residents by 2041. At current development rates, new housing supply should meet demand comfortably, providing good conditions for buyers and potentially supporting growth beyond current population projections.

Semaphore Park has emerging levels of nearby infrastructure activity, ranking in the 30thth percentile nationally

Changes to local infrastructure significantly impact an area's performance. AreaSearch identified seven projects potentially affecting the region. Notable initiatives include West Lakes Shore Masterplan Residential Release, Novo West Lakes Stage 2, West Lakes Marina Upgrade, and West Lakes Sports Complex Upgrade, as detailed below.

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 an unemployment rate of 5.3% as of September 2025, with an estimated employment growth of 3.9% over the past year. This is based on AreaSearch aggregation of statistical area data.

There are 2,233 residents in work while the unemployment rate is 1.3% above Greater Adelaide's rate of 3.9%. Workforce participation lags at 52.4%, compared to Greater Adelaide's 61.7%. Leading employment industries among residents comprise health care & social assistance, construction, and education & training. The area has a particularly notable concentration in construction, with employment levels at 1.2 times the regional average.

However, health care & social assistance has limited presence with 15.1% employment compared to 17.7% regionally. The predominantly residential area appears to offer limited employment opportunities locally, as indicated by the count of Census working population vs resident population. Over a 12-month period ending in September 2025, employment increased by 3.9% alongside labour force increasing by 3.8%, with unemployment remaining essentially unchanged. This contrasts with Greater Adelaide where employment rose by 3.0%, the labour force grew by 2.9%, and unemployment fell 0.1 percentage points. State-level data to 25-Nov-25 shows SA employment grew by 1.19% year-on-year, adding 10,710 jobs, with the state unemployment rate at 4.0%. This compares favourably to the national unemployment rate of 4.3%, with the state's employment growth outpacing the national average of 0.14%. National employment forecasts from Jobs and Skills Australia for May-25 suggest employment should increase by 6.4% over five years and 13.4% over ten years in Semaphore Park, applying industry-specific projections to its employment mix.

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

AreaSearch's latest postcode level ATO data for financial year 2023 shows that income in Semaphore Park is below national average. Median income is $46,765 and average income stands at $62,382. This contrasts with Greater Adelaide's figures of median income $54,808 and average income $66,852. Based on Wage Price Index growth of 8.8% since financial year 2023, current estimates would be approximately $50,880 (median) and $67,872 (average) as of September 2025. From the 2021 Census, household, family and personal incomes in Semaphore Park all fall between 17th and 20th percentiles nationally. Income brackets indicate 25.8% of population falls within $1,500 - $2,999 income range. Housing affordability pressures are severe with only 82.4% of income remaining, ranking at the 17th percentile. Area'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 dwelling structure, as per the latest Census, consisted of 54.0% houses and 46.0% other dwellings (semi-detached, apartments, 'other' dwellings). In comparison, Adelaide metro had 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 in the area was $1,786, higher than Adelaide metro's average of $1,733. Weekly rent in Semaphore Park was recorded at $250, lower than Adelaide metro's figure of $325. Nationally, Semaphore Park's mortgage repayments were lower than the Australian average of $1,863, and rents were substantially below the national figure of $375.

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

Family households constitute 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 account for 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 residents aged 15+ have a university degree attainment rate of 22.1%, compared to Australia's 30.4%. This indicates potential for educational development. Bachelor degrees are the most common (15.9%), followed by postgraduate qualifications (4.2%) and graduate diplomas (2.0%). Vocational credentials are also prominent, with 35.7% of residents holding them, including advanced diplomas (10.3%) and certificates (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.

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

Transport analysis shows 25 active stops operating within Semaphore Park. These are mixed bus services. They are covered by 12 routes, providing a total of 411 weekly passenger trips.

Accessibility is rated excellent, with residents typically located 155 meters from the nearest stop. Service frequency averages 58 trips per day across all routes, equating to approximately 16 weekly trips per 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 is relatively low, at approximately 52% of the total population (~2,516 people). The most common medical conditions are arthritis (10.9%) and mental health issues (9.6%). Conversely, 60.7% of residents report no medical ailments, compared to 68.9% in Greater Adelaide. The area has a higher proportion of seniors aged 65 and over (26.5%, or 1,290 people), compared to Greater Adelaide's 20%. Despite this, health outcomes among seniors are challenging but perform better than the general population in health metrics.

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 regional average, as seen in its population born in Australia (79.2%), citizens (88.8%), and English-only speakers at home (89.3%). Christianity is the predominant religion, comprising 46.0% of Semaphore Park residents. Notably, Islam is overrepresented at 1.2%, compared to Greater Adelaide's average of 2.8%.

The top three parental ancestry groups are English (30.2%), Australian (24.9%), and Irish (7.9%), all higher than regional averages. Other ethnicities with notable differences include Polish (Semaphore Park: 1.7% vs regional: 1.4%), Russian (Semaphore Park: 0.7% vs regional: 0.6%), and Welsh (Semaphore Park: 0.8% vs regional: 0.5%).

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

Semaphore Park's median age is 46 years, which is significantly higher than Greater Adelaide's average of 39 years and Australia's median age of 38 years. The age profile shows that individuals aged 75-84 years are particularly prominent, making up 9.8% of the population, while those aged 15-24 years make up only 9.3%. Between 2021 and present, the proportion of individuals aged 75-84 has grown from 7.5% to 9.8%, while the proportion of those aged 55-64 has declined 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 that Semaphore Park's 85+ cohort is projected to grow by 121%, adding 259 residents to reach a total of 474. Senior residents aged 65 and above will drive 69% of the population growth, highlighting demographic aging trends in the area. Conversely, population declines are projected for individuals aged 55-64 years and those aged 35-44 years.