Population
−37.5% since 2016.
Mount Observation, SA
Mount Observation had a population of 10 at the 2021 Census (−37.5% since 2016). Median age 35.5. Source: ABS Census 2021, via Censible. Census 2026 data arrives June 2027.
Mount Observation at a glance
What the 2021 Census says, compared with South Australia.
Between the 2016 and 2021 censuses, Mount Observation's population shrank by 37.5% to 10, slower than South Australia as a whole (+6.3%). With a median age of 35.5, it is younger than the SA average (40.9). Children under 10 make up 0.0% of residents, and people aged 70 and over 0.0%.
0.0% of households rent, a smaller share than the SA average of 27.9%. 0.0% own their home outright. Almost every home is a house; flats and apartments are 0.0% of homes. The 2021 Census counted 3 households.
0.0% of residents were born overseas, fewer than the SA average of 25.2%. 0.0% use a language other than English at home. 80.0% report no religion, higher than the SA average (48.9%).
Key figures
2021 Census, Mount Observation beside SA and Australia.
| Measure | Mount Observation | SA | Australia |
|---|---|---|---|
| Population | 10 | 1,781,501 | 25,422,828 |
| Growth since 2016 | −37.5% | +6.3% | +8.6% |
| Median age | 35.5 | 40.9 | 38.2 |
| Households | 3 | 691,344 | 9,275,123 |
| Flats and apartments | 0.0% | 6.8% | 14.3% |
| Renting | 0.0% | 27.9% | 31.1% |
| Owned outright | 0.0% | 33.3% | 31.4% |
| Median household income a week | – | $1,456 | $1,747 |
| Median rent a week | – | $300 | $376 |
| Median mortgage repayment a month | – | $1,505 | $1,866 |
| Born overseas | 0.0% | 25.2% | 29.3% |
| Other language at home | 0.0% | 18.7% | 23.6% |
| No religion | 80.0% | 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 35.5, against 40.9 for South Australia.
Source: ABS Census 2021, via Censible. How the figures are built
Cultural background
The largest groups in Mount Observation at the 2021 Census.
Ancestry
Languages at home
Country of birth
Source: ABS Census 2021, via Censible. How the figures are built
Around Mount Observation
The places it belongs to, sits beside and contains.
Part of
Nearby
Explore Mount Observation in Censible
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