South Australia · Postcode 5085
Northgate postcode and suburb data
South Australia · Phone area code 08 · 9 km from Adelaide
Suburb snapshot
Northgate 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.
Where Northgate ranks: household income is in the top 25% of SA suburbs; rents are among the top 10% in SA; SEIFA decile 9 puts it in the top 20% of Australia for socio-economic advantage.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Northgate vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Northgate | SA avg | AU avg | Greater Adelaide |
|---|---|---|---|---|
| Household income/wk | $2,207 +SA | $1,545 | $1,836 | $1,620 |
| Rent/wk | $395 +SA | $308 | $390 | $329 |
| Mortgage/month | $1,742 +SA | $1,558 | $1,958 | $1,666 |
| Median age | 38 | 45.0 | 45.0 | 42.0 |
| SEIFA decile | 9/10 +SA | 5.0/10 | 6.0/10 | 7.0/10 |
| Unemployment | 4.0% -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.
Postcode 5085 covers Northgate, an inland suburb of Adelaide about 9 km from the city centre. It forms part of the Adelaide - North region of South Australia. Local government services are provided by Port Adelaide Enfield.
According to the 2021 Census, Northgate has a population of 3,184 with a median age of 38. The median weekly household income is $2,207, above the SA average. The unemployment rate is 4.0%, lower than the SA average. The Indigenous population is 29 (0.9% of residents).
Housing in Northgate includes a median weekly rent of $395, median monthly mortgage repayment of $1,742, with 1,041 total dwellings. These housing costs sit above the SA average. Owner-occupied dwellings (owned or mortgaged) make up 77.0% of housing.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Northgate scores in decile 9 out of 10, which is well above the national average.
Northgate is served by Cedar College.
Northgate is part of the Port Adelaide - East statistical area in South Australia.
Northgate details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5085 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 3,184 |
| Median Age | 38 years |
| Median Household Income (Census 2021) | $2,207/week |
| Median Personal Income (Census 2021) | $881/week |
| Median Weekly Rent (Census 2021) | $395 |
| Median Monthly Mortgage (Census 2021) | $1,742 |
| Average Household Size | 3 persons |
| Area | 1.0 km² |
| Population Density | 3155/km² |
| Total Dwellings | 1,041 |
| Australian Citizens | 88.5% |
| Indigenous Population | 29 (0.9%) |
| Unemployment Rate | 4.0% |
| SEIFA IRSAD Decile | 9/10 (well above average) |
| Latitude | -34.8523266 |
| Longitude | 138.6291326 |
| Distance from Adelaide | 9 km |
| Region (SA4) | Adelaide - North |
| Area (SA3) | Port Adelaide - East |
| Local Government | Port Adelaide Enfield |
| Federal Electorate | Adelaide |
| State Electorate | Enfield |
| Time Zone | ACST (UTC+9:30), Australia/Adelaide (standard time) |
Age Profile
Show counts
| 0–14 years | 708 (22.2%) |
| 15–24 years | 382 (12.0%) |
| 25–44 years | 860 (27.0%) |
| 45–64 years | 838 (26.3%) |
| 65+ years | 398 (12.5%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Asthma | 224 (7.0%) |
| Arthritis | 220 (6.9%) |
| Diabetes | 156 (4.9%) |
| Heart Disease | 94 (3.0%) |
| Cancer | 57 (1.8%) |
| Dementia | 29 (0.9%) |
| Lung Condition | 25 (0.8%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 18 (1.7%) |
| 1 vehicle | 283 (27.3%) |
| 2 vehicles | 512 (49.4%) |
| 3+ vehicles | 224 (21.6%) |
Schools in Northgate
ACARA 2025 school profiles for schools located in Northgate. ICSEA is shown where ACARA publishes it.
Suburbs Near Northgate
Same Postcode (5085)
More Northgate 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.