Suburb report · SA 5159
Flagstaff Hill
Prepared by the property strategists at Chase Wealth Australia
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Population
10,664
Flagstaff Hill suburb profile
Who lives in Flagstaff Hill
Flagstaff Hill sits 14km from the Adelaide CBD, in the middle ring of the capital. With 10,664 residents, Flagstaff Hill is in the largest fifth of South Australian suburbs, well above the 3,045 of the median suburb. Among the 340 suburbs within 40km of the Adelaide CBD, it ranks 16 by population. At a median age of 43, Flagstaff Hill sits in the older band of South Australian suburbs. Among suburbs within 40km of the Adelaide CBD, 86 of 340 have an older median age.
Income and home ownership
At $116,100, the median household income is among the highest in South Australia, ahead of 85% of suburbs. On household income it ranks 58 of 340 suburbs within 40km of the Adelaide CBD. An ownership share of 89.5% is higher than 93% of South Australian suburbs, against 73.1% in the median suburb. On ownership it ranks 22 of 340 suburbs within 40km of the Adelaide CBD.
Household mix
The 2021 Census counted 3,617 occupied private dwellings in Flagstaff Hill, one of the larger housing stocks in South Australia. Families with children are the largest household type at 49.3%, ahead of couples without children at 33.7% and people living alone at 15.6%. Of the 340 suburbs within 40km of the Adelaide CBD, 50 have a higher share of families with children and 286 a lower one. Few South Australian suburbs have fewer people living alone: 15.6% of households, at the 4th percentile. The 33.7% share of couples without children is among the highest in South Australia.
Housing supply
Approvals have fallen sharply: 16 new dwellings were approved across the Flagstaff Hill statistical area in the year to June 2025, against its 2020 to 2024 average of 55 a year. Supply figures here are for the Flagstaff Hill statistical area, home to 11,370 residents in 2025, which closely matches Flagstaff Hill. Per head of population the pipeline is thin: 1.4 approvals per 1,000 residents of that area against 5.2 for the median South Australian area. Between 2020 and 2025 the area's approvals peaked at 184 in 2020 and bottomed at 14 in 2024.
Population trend
The population of the Flagstaff Hill statistical area grew 4.6% from 2020 to 2025, against 6.3% for South Australia as a whole. The median South Australian statistical area grew 4.8% over the same 5 years, 0.2 points faster than this one. That rate is faster than 49% of South Australian statistical areas. Year by year, the change ran from -0.1% in 2021 to 1.8% in 2023.
Against its neighbours
Of the nearby suburbs listed below, Happy Valley differs most on the median household income: $88,700 there against $116,100 in Flagstaff Hill. Aberfoyle Park is the closest match on the median age, at 42 against 43. Hallett Cove, 8km away, has 12,696 residents and a median household income of $106,700.
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 Flagstaff Hill data table is dated at its source. Supply and population change cover the Flagstaff Hill statistical area, whose boundary differs from Flagstaff Hill'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.