26,734 ▲ +13.8%
Higher than 86% of urban centre areas.
- 2011: 23,485
- 2016: 21,501
- 2021: 26,734
The number of people who usually live in the area, counted on Census night.
Mount Gambier · Urban Centre
Demographics & Identity in Mount Gambier
Who lives here — how many people, how old they are, and how communities identify.
A population of 26,734 makes Mount Gambier one of the largest areas of its kind in the region. The community has grown younger and larger over the last decade, with the typical resident now 41 years old. This is a significant shift from 2011, when the typical age was 56.
26,734
▲ +13.8%
- 1–2: 3 areas
- 2–3: 0 areas
- 3–5: 0 areas
- 5–9: 0 areas
- 9–16: 2 areas
- 16–27: 1 area
- 27–47: 2 areas
- 47–81: 2 areas
- 81–139: 14 areas
- 139–241: 145 areas
- 241–418: 340 areas
- 418–723: 351 areas
- 723–1,252: 304 areas
- 1,252–2,168: 191 areas
- 2,168–3,752: 181 areas
- 3,752–6,495: 107 areas
- 6,495–11,242: 69 areas
- 11,242–19,459: 44 areas
- 19,459–33,683: 31 areas
- 33,683–58,304: 17 areas
- 58,304–100,921: 8 areas
- 100,921–174,689: 8 areas
- 174,689–302,378: 4 areas
- 302,378–523,401: 5 areas
- 523,401–905,982: 2 areas
- 905,982–1,568,210: 1 area
- 1,568,210–2,714,494: 2 areas
- 2,714,494–4,698,656: 2 areas
All urban centre areas, 2021. The marker is Mount Gambier — higher than 86% of areas.
| Mount Gambier | 26,734 |
|---|---|
| 5290, SA | 25,591 |
| South Australia | 1,781,516 |
| Australia | 25,422,788 |
Population
How many people, and the typical age.
The population grew by 14% since 2011, adding about 3,249 people. While the typical age is now about the same as the South Australian figure, it remains noticeably older than the national average of 38.
41 yrs ▼ -26.8%
Younger than 64% of urban centre areas.
- 2011: 56 yrs
- 2016: 40 yrs
- 2021: 41 yrs
Half the population is older than this age, and half younger.
Age profile
How the population splits across age groups.
Children under 15 now make up 18.2% of the area, a rise of 4.7 percentage points since 2011. Seniors aged 65 and over account for 21.3% of the population, which is well above the national figure of 17.2%.
21.3% ▼ -38.2%
Lower than 54% of urban centre areas.
- 2011: 34.4%
- 2016: 17.1%
- 2021: 21.3%
Share of the population aged 65 years and over.
18.2% ▲ +35.1%
Higher than 55% of urban centre areas.
- 2011: 13.5%
- 2016: 19.2%
- 2021: 18.2%
Share of the population aged under 15 years.
Age structure
View on map →Mount Gambier splits fairly evenly between Older adults (45–64) (25%) and Young adults (25–44) (24%), with Seniors (65+) at 21%.
Identity & relationships
First Nations identity and marital status.
About 2.8% of residents identify as Aboriginal or Torres Strait Islander, which is about the same as the state and national figures. People in de facto relationships make up 12.8% of the population, slightly above the national average of 11.5%.
2.8% ▲ +134.0%
Lower than 67% of urban centre areas.
- 2011: 1.2%
- 2016: 4.8%
- 2021: 2.8%
Share of people who identify as Aboriginal and/or Torres Strait Islander.
12.8% ▲ +48.9%
Lower than 53% of urban centre areas.
- 2011: 8.6%
- 2016: 12.9%
- 2021: 12.8%
Share of people aged 15+ who are in a de facto marriage (registered marriages excluded).
Marital status
View on map →In Mount Gambier, the largest group is Married at 43%, followed by Never married (36%) and Divorced (11%).
Age & sex structure
Sources
- Census of Population and Housing — Australian Bureau of Statistics, 2021 (CC BY 4.0).
More for Mount Gambier
Cite this page
Australian Bureau of Statistics. (2021). Demographics & Identity in Mount Gambier [Census of Population and Housing]. CensusAtlas, used under CC BY 4.0. https://censusatlas.au/region/ucl/UCL412003/mount-gambier/topic/demographics-identity