26,878 ▲ +6.5%
Higher than 64% of council (lga) areas.
- 2011: 25,247
- 2016: 26,276
- 2021: 26,878
The number of people who usually live in the area, counted on Census night.
Mount Gambier · Council (LGA)
Demographics & Identity in Mount Gambier
Who lives here — how many people, how old they are, and how communities identify.
A growing population has aged by four years since 2011 in Mount Gambier, where the typical resident is now 41. The area has become noticeably older than the national average, with seniors now making up a significant part of the local community.
26,878
▲ +6.5%
- 1–2: 3 areas
- 2–3: 0 areas
- 3–4: 0 areas
- 4–7: 0 areas
- 7–12: 2 areas
- 12–20: 1 area
- 20–33: 0 areas
- 33–55: 1 area
- 55–91: 0 areas
- 91–150: 5 areas
- 150–248: 3 areas
- 248–409: 13 areas
- 409–675: 22 areas
- 675–1,115: 38 areas
- 1,115–1,840: 37 areas
- 1,840–3,038: 30 areas
- 3,038–5,014: 40 areas
- 5,014–8,276: 49 areas
- 8,276–13,661: 54 areas
- 13,661–22,550: 57 areas
- 22,550–37,223: 43 areas
- 37,223–61,442: 49 areas
- 61,442–101,420: 39 areas
- 101,420–167,409: 37 areas
- 167,409–276,336: 31 areas
- 276,336–456,137: 8 areas
- 456,137–752,926: 2 areas
- 752,926–1,242,825: 1 area
All council (lga) areas, 2021. The marker is Mount Gambier — higher than 64% of areas.
| Mount Gambier | 26,878 |
|---|---|
| Rest of SA | 390,843 |
| South Australia | 1,781,516 |
| Australia | 25,422,788 |
Population
How many people, and the typical age.
The population grew by 6.5% since 2011, adding about 1,631 people to reach a total of 26,878. This makes Mount Gambier larger than about 66% of similar areas.
41 yrs ▲ +10.8%
Younger than 57% of council (lga) areas.
- 2011: 37 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.
Seniors aged 65 and over now make up 21.3% of the population, which is well above the national figure of 17.2%. This group rose by 5.7 percentage points since 2011, while the proportion of children under 15 fell by 2.6 points.
21.3% ▲ +36.4%
Higher than 59% of council (lga) areas.
- 2011: 15.6%
- 2016: 18.5%
- 2021: 21.3%
Share of the population aged 65 years and over.
18.2% ▼ -12.4%
Higher than 58% of council (lga) areas.
- 2011: 20.8%
- 2016: 19.8%
- 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 and 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, a little above the national figure of 11.5%.
2.8% ▲ +24.6%
Lower than 61% of council (lga) areas.
- 2011: 2.3%
- 2016: 2.2%
- 2021: 2.8%
Share of people who identify as Aboriginal and/or Torres Strait Islander.
12.8% ▲ +16.7%
Lower than 51% of council (lga) areas.
- 2011: 10.9%
- 2016: 11.1%
- 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 (10%).
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/lga/LGA44620/mount-gambier/topic/demographics-identity