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South Australia · Postcode 5085
Northfield postcode and suburb data
South Australia · Phone area code 08 · 9 km from Adelaide
Suburb snapshot
Northfield 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 Northfield ranks: SEIFA decile 2 places it in the bottom 20% of Australia for socio-economic advantage.
ABS Census 2021 · SEIFA 2021Detailed comparison table
Northfield vs the SA average and the national average, using population-weighted 2021 Census data.
| Metric | Northfield | SA avg | AU avg | Greater Adelaide |
|---|---|---|---|---|
| Household income/wk | $1,420 ≈SA | $1,545 | $1,836 | $1,620 |
| Rent/wk | $307 ≈SA | $308 | $390 | $329 |
| Mortgage/month | $1,580 ≈SA | $1,558 | $1,958 | $1,666 |
| Median age | 35 | 45.0 | 45.0 | 42.0 |
| SEIFA decile | 2/10 -SA | 5.0/10 | 6.0/10 | 7.0/10 |
| Unemployment | 7.2% +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 Northfield, 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, Northfield has a population of 5,043 with a median age of 35. The median weekly household income is $1,420, close to the SA average. The unemployment rate is 7.2%, higher than the SA average. The Indigenous population is 343 (6.8% of residents).
Housing in Northfield includes a median weekly rent of $307, median monthly mortgage repayment of $1,580, with 1,573 total dwellings. Rental properties account for 41.9% of dwellings.
On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Northfield scores in decile 2 out of 10, which is well below the national average.
Northfield is served by Northfield Primary School.
Northfield is part of the Port Adelaide - East statistical area in South Australia.
Northfield details
Location, Census, housing, SEIFA and geography fields used across this profile.
| Postcode | 5085 |
| State | South Australia (SA) |
| Phone Area Code | 08 |
| Population (2021) | 5,043 |
| Median Age | 35 years |
| Median Household Income (Census 2021) | $1,420/week |
| Median Personal Income (Census 2021) | $679/week |
| Median Weekly Rent (Census 2021) | $307 |
| Median Monthly Mortgage (Census 2021) | $1,580 |
| Average Household Size | 2.6 persons |
| Area | 2.2 km² |
| Population Density | 2279/km² |
| Total Dwellings | 1,573 |
| Australian Citizens | 65.6% |
| Indigenous Population | 343 (6.8%) |
| Unemployment Rate | 7.2% |
| SEIFA IRSAD Decile | 2/10 (well below average) |
| Latitude | -34.8507485 |
| Longitude | 138.6213476 |
| 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 | 870 (17.3%) |
| 15–24 years | 559 (11.1%) |
| 25–44 years | 2,071 (41.1%) |
| 45–64 years | 959 (19.0%) |
| 65+ years | 585 (11.6%) |
Housing Tenure
SEIFA socio-economic index
Health Conditions (2021 Census)
| Arthritis | 345 (6.8%) |
| Asthma | 317 (6.3%) |
| Diabetes | 265 (5.3%) |
| Heart Disease | 141 (2.8%) |
| Lung Condition | 98 (1.9%) |
| Cancer | 95 (1.9%) |
| Dementia | 11 (0.2%) |
Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.
Motor Vehicles per Dwelling
| No vehicle | 167 (10.8%) |
| 1 vehicle | 563 (36.5%) |
| 2 vehicles | 581 (37.6%) |
| 3+ vehicles | 233 (15.1%) |
Schools in Northfield
ACARA 2025 school profiles for schools located in Northfield. ICSEA is shown where ACARA publishes it.
Suburbs Near Northfield
Same Postcode (5085)
More Northfield 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.