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South Australia · Postcode 5019
Semaphore Park postcode and suburb data
South Australia · Phone area code 08 · 13 km from Adelaide
Suburb snapshot
Semaphore Park at a glance vs SA
Fast facts and benchmark bars show the suburb's key postcode, Census, SEIFA, school and LGA signals in context.
Quick facts
Benchmarks against SA
Income, rent and SEIFA figures are from the ABS 2021 Census and are reported in 2021 dollars, not adjusted for subsequent inflation.
Detailed comparison table
Semaphore Park vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Semaphore Park | SA avg | AU avg | Greater Adelaide |
|---|---|---|---|---|
| Household income/wk | $1,262 -SA | $1,545 | $1,836 | $1,620 |
| Rent/wk | $250 -SA | $308 | $390 | $329 |
| Mortgage/month | $1,786 +SA | $1,558 | $1,958 | $1,666 |
| Median age | 46 | 45.0 | 45.0 | 42.0 |
| SEIFA decile | 3/10 -SA | 5.0/10 | 6.0/10 | 7.0/10 |
| Unemployment | 6.0% ≈SA | 6.0% | 5.0% | 6.0% |
Green pill = at least 10% above the SA average; red = at least 10% below; grey = within 10%. For unemployment, colour polarity is inverted: lower is better.
Semaphore Park is a coastal suburb of Adelaide in South Australia, with postcode 5019. It sits about 13 km from the Adelaide CBD, within the Charles Sturt local government area. The suburb footprint covers roughly 1.9 square kilometres.
According to the 2021 Census, Semaphore Park has a population of 4,541 with a median age of 46. The median weekly household income is $1,262, below the SA average. The unemployment rate is 6.0%. The Indigenous population is 113 (2.5% of residents).
Housing in Semaphore Park includes a median weekly rent of $250, median monthly mortgage repayment of $1,786, with 1,891 total dwellings. These housing costs sit above the SA average. Owner-occupied dwellings (owned or mortgaged) make up 61.0% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Semaphore Park scores in decile 3 out of 10, which is below the national average.
Semaphore Park is served by Westport Primary School.
Semaphore Park is part of the Port Adelaide - West statistical area in South Australia.
Semaphore Park details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5019 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 4,541 |
| Median Age | 46 years |
| Median Household Income (Census 2021) | $1,262/week |
| Median Personal Income (Census 2021) | $656/week |
| Median Weekly Rent (Census 2021) | $250 |
| Median Monthly Mortgage (Census 2021) | $1,786 |
| Average Household Size | 2.2 persons |
| Area | 1.9 km² |
| Population Density | 2374/km² |
| Total Dwellings | 1,891 |
| Australian Citizens | 88.8% |
| Indigenous Population | 113 (2.5%) |
| Unemployment Rate | 6.0% |
| SEIFA IRSAD Decile | 3/10 (below average) |
| Latitude | -34.854 |
| Longitude | 138.484 |
| Distance from Adelaide | 13 km |
| Region (SA4) | Adelaide - West |
| Area (SA3) | Port Adelaide - West |
| Local Government | Charles Sturt |
| Federal Electorate | Hindmarsh |
| State Electorate | Port Adelaide |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 688 (15.2%) |
| 15–24 years | 410 (9.0%) |
| 25–44 years | 1,104 (24.3%) |
| 45–64 years | 1,185 (26.1%) |
| 65+ years | 1,163 (25.6%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 592 (13.0%) |
| Asthma | 466 (10.3%) |
| Diabetes | 283 (6.2%) |
| Heart Disease | 266 (5.9%) |
| Cancer | 190 (4.2%) |
| Lung Condition | 123 (2.7%) |
| Dementia | 98 (2.2%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 191 (10.3%) |
| 1 vehicle | 778 (42.0%) |
| 2 vehicles | 642 (34.6%) |
| 3+ vehicles | 243 (13.1%) |
Schools in Semaphore Park
ACARA 2025 school profiles for schools located in Semaphore Park. ICSEA is shown where ACARA publishes it.
Suburbs Near Semaphore Park
Same Postcode (5019)
More Semaphore Park Data
Page last reviewed . Data sources: Australian Bureau of Statistics 2021 Census (CC BY 4.0), SEIFA 2021 IRSAD, ACARA school profiles 2025. How this data is sourced.