35,520 ▼ -9.3%
Lower than 85% of state electorate areas.
- 2011: 39,166
- 2016: 34,515
- 2021: 35,520
The number of people who usually live in the area, counted on Census night.
Mount Gambier · State Electorate
Demographics & Identity in Mount Gambier
Who lives here — how many people, how old they are, and how communities identify.
A typical resident in Mount Gambier is noticeably older than those in most similar areas. This aging trend is clear, with the usual age rising by 9 years since 2011 to reach 42. While the population has shrunk by 9.3% over the last decade, the area remains a significant regional centre with 35,520 people.
35,520
▼ -9.3%
- 1–2: 3 areas
- 2–2: 0 areas
- 2–4: 0 areas
- 4–5: 0 areas
- 5–8: 0 areas
- 8–13: 2 areas
- 13–19: 1 area
- 19–29: 0 areas
- 29–44: 1 area
- 44–68: 0 areas
- 68–103: 1 area
- 103–158: 0 areas
- 158–240: 1 area
- 240–366: 1 area
- 366–559: 1 area
- 559–852: 1 area
- 852–1,299: 0 areas
- 1,299–1,980: 1 area
- 1,980–3,018: 0 areas
- 3,018–4,602: 2 areas
- 4,602–7,016: 2 areas
- 7,016–10,696: 28 areas
- 10,696–16,307: 5 areas
- 16,307–24,861: 5 areas
- 24,861–37,902: 41 areas
- 37,902–57,783: 150 areas
- 57,783–88,095: 162 areas
- 88,095–134,306: 43 areas
All state electorate areas, 2021. The marker is Mount Gambier — lower than 85% of areas.
| Mount Gambier | 35,520 |
|---|---|
| Rest of SA | 390,843 |
| South Australia | 1,781,516 |
| Australia | 25,422,788 |
Population
How many people, and the typical age.
The usual age of 42 is a little older than the South Australian figure of 41 and noticeably older than the Australian average of 38. This shift follows a population decrease of about 3,646 people since 2011.
42 yrs ▲ +27.3%
Older than 71% of state electorate areas.
- 2011: 33 yrs
- 2016: 41 yrs
- 2021: 42 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 make up 20.8% of the population, which is well above the Australian figure of 17.2%. This group has grown by 8.9 percentage points since 2011, while the proportion of children under 15 fell by 5.1 percentage points in the same period.
20.8% ▲ +75.1%
Higher than 75% of state electorate areas.
- 2011: 11.9%
- 2016: 17.9%
- 2021: 20.8%
Share of the population aged 65 years and over.
17.9% ▼ -22.3%
Lower than 51% of state electorate areas.
- 2011: 23.0%
- 2016: 19.5%
- 2021: 17.9%
Share of the population aged under 15 years.
Age structure
View on map →Mount Gambier splits fairly evenly between Older adults (45–64) (26%) and Young adults (25–44) (23%), with Seniors (65+) at 21%.
Identity & relationships
First Nations identity and marital status.
About 2.8% of the community are Aboriginal and Torres Strait Islander people, which is about the same as the state and national figures. Most residents are married at 46%, while 12.5% are in de facto relationships.
2.8% ▼ -11.6%
Higher than 58% of state electorate areas.
- 2011: 3.2%
- 2016: 2.1%
- 2021: 2.8%
Share of people who identify as Aboriginal and/or Torres Strait Islander.
12.5% ▼ -0.8%
Higher than 58% of state electorate areas.
- 2011: 12.6%
- 2016: 11.0%
- 2021: 12.5%
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 46%, followed by Never married (34%) 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/sed/SED40033/mount-gambier/topic/demographics-identity