Suburb report · SA 5023
Seaton
Prepared by the property strategists at Chase Wealth Australia
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Population
11,346
Seaton suburb profile
Who lives in Seaton
Seaton sits 9km from the Adelaide CBD, inside the inner ring of the capital. Seaton is home to 11,346 people, a scale matched by fewer than 3% of South Australian suburbs. By population it is number 12 of 340 suburbs within 40km of the Adelaide CBD. The median age of 39 is a little younger than the 41 of the median South Australian suburb. Of the 340 suburbs within 40km of the Adelaide CBD, 128 have a younger median age. In the other suburb of the Seaton-Grange statistical area the median age is 48, so Seaton runs 9 years younger than its statistical-area neighbours.
Income and home ownership
Median household income is $75,100, below the $88,600 of the median South Australian suburb. The other suburb of the Seaton-Grange statistical area has $98,700, putting Seaton 23.9% below its statistical-area neighbours. Among the 340 suburbs within 40km of the Adelaide CBD, 282 report a higher median household income. Ownership runs at 62.9%, with 37.1% renting, at the 26th percentile of South Australian suburbs. On ownership it ranks 243 of 340 suburbs within 40km of the Adelaide CBD. That is 12.1 points below the 75% ownership share in the other suburb of the Seaton-Grange statistical area.
Household mix
At the 2021 Census, 4,535 households lived in Seaton, more than in 97% of South Australian suburbs. The household mix leans to families: families with children 40.1%, couples without children 23.1%, people living alone 33.3% and group households 3.5%. On the share of families with children it ranks 222 of 340 suburbs within 40km of the Adelaide CBD. At 33.3%, people living alone are more common here than in 76% of South Australian suburbs. Couples without children are scarce at 23.1%, fewer than in 81% of South Australian suburbs. In the other 1 suburb of the Seaton-Grange statistical area, families with children make up 36.9% of households, against 40.1% here.
Housing supply
191 new dwellings were approved across the Seaton-Grange statistical area in the year to June 2025, 26% above its 2020 to 2024 average of 151 a year. The Seaton-Grange statistical area had 18,429 residents in 2025 and takes in Seaton and neighbouring suburbs. That is 10.4 approvals per 1,000 residents of that area, one of the heaviest pipelines in South Australia, above 84% of statistical areas. Between 2020 and 2025 the area's approvals peaked at 191 in 2025 and bottomed at 132 in 2020.
Population trend
From 2020 to 2025, the Seaton-Grange statistical area expanded its population by 4.4%, against 6.3% for South Australia as a whole. Over those 5 years a typical South Australian statistical area added 4.8%, putting this area 0.4 points behind. It ranks at the 46th percentile of South Australian statistical areas for population growth over the period. Growth was strongest in the year to 2023 (1.7%) and weakest in the year to 2021 (0.1%).
Against its neighbours
The sharpest contrast among the nearby suburbs is Prospect, where the median household income is $114,900 compared with $75,100 here. On the median household income, Adelaide comes closest to Seaton: $75,400 against $75,100. At 13km, Mawson Lakes counts 14,746 residents against 11,346 in Seaton.
Location
Demographics
ABS Data by Region to 2025, on ABS Census 2021 suburb baselineHousehold Mix Census 2021
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Reading this report
Every figure in the Seaton data table is dated at its source. Supply and population change cover the Seaton-Grange statistical area, whose boundary differs from Seaton's, and our guide to reading a suburb report explains how our buyers agents weigh them.
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This report is market intelligence prepared by Chase Wealth Australia for general information only. Figures are statistical estimates for the suburb, not valuations of any individual property, and do not constitute financial or credit advice. Consider your circumstances and seek professional advice before acting. Demographic figures are sourced from the Australian Bureau of Statistics, Census 2021 (licensed CC BY 4.0) where available.