Data study
South Australia in numbers
Every South Australia postcode and suburb ranked by population, household income and age, from the 2021 Census and the national address file. Paralowie (5108) is the most populated; Roxby Downs (5725) earns the most; Edinburgh is the youngest suburb.
Most populated postcodes
Residents (2021 Census)
- 15108 · Paralowie43,329people
- 25114 · Andrews Farm36,847people
- 35162 · Morphett Vale35,328people
- 45159 · Happy Valley33,635people
- 55290 · Mount Gambier25,591people
- 65158 · Hallett Cove25,087people
- 75085 · Lightsview24,786people
- 85095 · Mawson Lakes21,372people
- 95109 · Salisbury East20,748people
- 105112 · Elizabeth East20,445people
Highest household income
Median, per week
- 15725 · Roxby Downs$3,140/wk
- 25150 · Leawood Gardens$2,666/wk
- 35140 · Greenhill$2,625/wk
- 45154 · Aldgate$2,561/wk
- 55152 · Stirling$2,430/wk
- 65066 · Burnside$2,399/wk
- 75151 · Piccadilly$2,386/wk
- 85136 · Norton Summit$2,316/wk
- 95137 · Ashton$2,312/wk
- 105061 · Unley$2,291/wk
Most densely populated
People per km²
- 15063 · Parkside3,302/km²
- 25038 · Plympton3,024/km²
- 35085 · Lightsview2,907/km²
- 45082 · Prospect2,894/km²
- 55044 · Somerton Park2,821/km²
- 65083 · Broadview2,817/km²
- 75045 · Glenelg North2,785/km²
- 85067 · Norwood2,744/km²
- 95012 · Mansfield Park2,687/km²
- 105037 · North Plympton2,679/km²
Youngest suburbs
Lowest median age
- 1Edinburgh23yrs
- 2Iwantja26yrs
- 3Munno Para West27yrs
- 4Pukatja27yrs
- 5Mimili27yrs
- 6Andrews Farm28yrs
- 7Bedford Park28yrs
- 8Eyre28yrs
Oldest suburbs
Highest median age
- 1Penfield70yrs
- 2North Moonta68yrs
- 3Goolwa67yrs
- 4Hillier67yrs
- 5Encounter Bay66yrs
- 6Goolwa North66yrs
- 7Port Vincent65yrs
- 8Clinton65yrs
About this data
Population, income and age figures come from the Australian Bureau of Statistics 2021 Census; postcode and suburb boundaries and address counts come from the Geocoded National Address File (G-NAF). Suburb age rankings exclude localities with fewer than 200 residents to avoid small-sample noise. Both datasets are published under CC BY 4.0 — see our data & attribution page. Free to reuse with a link back to this page.