Data study
New South Wales in numbers
Every New South Wales postcode and suburb ranked by population, household income and age, from the 2021 Census and the national address file. Liverpool (2170) is the most populated; Seaforth (2092) earns the most; Callaghan is the youngest suburb.
Most populated postcodes
Residents (2021 Census)
- 12170 · Liverpool114,479people
- 22145 · Westmead87,531people
- 32560 · Campbelltown82,543people
- 42155 · Kellyville75,699people
- 52250 · Gosford71,168people
- 62148 · Blacktown67,483people
- 72259 · Hamlyn Terrace66,236people
- 82570 · Oran Park63,663people
- 92153 · Baulkham Hills62,610people
- 102650 · Wagga Wagga61,511people
Highest household income
Median, per week
- 12092 · Seaforth$4,184/wk
- 22063 · Northbridge$3,874/wk
- 32030 · Vaucluse$3,481/wk
- 42073 · Pymble$3,414/wk
- 52619 · Jerrabomberra$3,403/wk
- 62110 · Hunters Hill$3,368/wk
- 72023 · Bellevue Hill$3,315/wk
- 82069 · Roseville$3,310/wk
- 92769 · The Ponds$3,285/wk
- 102094 · Fairlight$3,251/wk
Most densely populated
People per km²
- 12017 · Waterloo14,961/km²
- 22009 · Pyrmont13,612/km²
- 32007 · Ultimo13,261/km²
- 42011 · Potts Point12,941/km²
- 52008 · Chippendale12,308/km²
- 62010 · Surry Hills12,167/km²
- 72043 · Erskineville11,959/km²
- 82016 · Redfern11,156/km²
- 92061 · Kirribilli9,750/km²
- 102042 · Newtown9,133/km²
Youngest suburbs
Lowest median age
- 1Callaghan20yrs
- 2Charles Sturt University20yrs
- 3Singleton Military Area21yrs
- 4Kapooka23yrs
- 5Forest Hill25yrs
- 6Yanco25yrs
- 7Keiraville26yrs
- 8Cliftleigh27yrs
Oldest suburbs
Highest median age
- 1Worrowing Heights77yrs
- 2Gilead74yrs
- 3Oxford Falls73yrs
- 4Doyalson North72yrs
- 5Shellharbour City Centre71yrs
- 6Tea Gardens69yrs
- 7Fullerton Cove69yrs
- 8Sandgate69yrs
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.