Population
+5.1% since 2016.
Onkaparinga, SA
Onkaparinga had a population of 175,204 at the 2021 Census (+5.1% since 2016). Median age 41.0. Median weekly household income $1,410. Source: ABS Census 2021, via Censible. Census 2026 data arrives June 2027.
Onkaparinga at a glance
What the 2021 Census says, compared with South Australia.
Between the 2016 and 2021 censuses, Onkaparinga's population grew by 5.1% to 175,204, slower than South Australia as a whole (+6.3%). Its median age of 41.0 is close to the SA average (41.0). Children under 10 make up 11.5% of residents, and people aged 70 and over 14.0%.
22.9% of households rent, a smaller share than the SA average of 27.9%. 30.7% own their home outright. Almost every home is a house; flats and apartments are 1.8% of homes. The 2021 Census counted 68,135 households.
The median household earns $1,410 a week, in line with the SA average of $1,455. Renters pay a median $312 a week, and households with a mortgage repay $1,449 a month.
22.1% of residents were born overseas, fewer than the SA average of 25.2%. 7.4% use a language other than English at home. 60.1% report no religion, higher than the SA average (48.9%).
Key figures
2021 Census, Onkaparinga beside SA and Australia.
| Measure | Onkaparinga | SA | Australia |
|---|---|---|---|
| Population | 175,204 | 1,781,516 | 25,422,788 |
| Growth since 2016 | +5.1% | +6.3% | +8.6% |
| Median age | 41.0 | 41.0 | 38.0 |
| Households | 68,135 | 691,313 | 9,275,217 |
| Flats and apartments | 1.8% | 6.8% | 14.3% |
| Renting | 22.9% | 27.9% | 31.1% |
| Owned outright | 30.7% | 33.3% | 31.4% |
| Median household income a week | $1,410 | $1,455 | $1,746 |
| Median rent a week | $312 | $300 | $375 |
| Median mortgage repayment a month | $1,449 | $1,500 | $1,863 |
| Born overseas | 22.1% | 25.2% | 29.3% |
| Other language at home | 7.4% | 18.7% | 23.6% |
| No religion | 60.1% | 48.9% | 41.9% |
Source: ABS Census 2021, via Censible. How the figures are built
Population and age
Each census since 2011, and the age profile in 2021.
Age
Median age 41.0, against 41.0 for South Australia.
Source: ABS Census 2021, via Censible. How the figures are built
Cultural background
The largest groups in Onkaparinga at the 2021 Census.
Ancestry
Languages at home
Country of birth
Source: ABS Census 2021, via Censible. How the figures are built
Around Onkaparinga
The places it belongs to, sits beside and contains.
Part of
Nearby
Suburbs in Onkaparinga
Largest first.
- Morphett Vale
- Happy Valley
- Woodcroft
- Aberfoyle Park
- Aldinga Beach
- Flagstaff Hill
- Seaford Rise
- Christies Beach
- Christie Downs
- Seaford Meadows
- Reynella
- Seaford
- Coromandel Valley
- Huntfield Heights
- McLaren Vale
- Noarlunga Downs
- Hackham
- Hackham West
- Old Reynella
- Moana
- Port Noarlunga
- Port Noarlunga South
- O'Halloran Hill
- Sellicks Beach
- Onkaparinga Hills
- Willunga
- Reynella East
- O'Sullivan Beach
- Port Willunga
- McLaren Flat
- Old Noarlunga
- Darlington
- Maslin Beach
- Seaford Heights
- Kangarilla
- Chandlers Hill
- Aldinga
- Clarendon
- Cherry Gardens
- Onkaparinga Heights
- Willunga South
- Blewitt Springs
- Coromandel East
- Whites Valley
- Sellicks Hill
- Tatachilla
- Noarlunga Centre
- The Range
- Lonsdale
Explore Onkaparinga in Censible
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