Census comparison · 2011 · 2016 · 2021
Mount Observation then and now
Side-by-side ABS Census comparison for Mount Observation, SA (postcode 5255) — how the suburb looked across Census years from 2011 to 2021.
Population
Census 2011 → 2016 → 2021
+233.3% over 10 years
| Metric | 2011 | 2016 | 2021 | Change (→2021) |
|---|---|---|---|---|
| Population | 3 | 16 | 10 | +7 · +233.3% |
| Median age | 43 | 41 | 39 | -4 · -9.3% |
| Median household income | $1,325/wk | — | $2,250/wk | +$925 · +69.8% |
| Median personal income | $525/wk | $649/wk | $1,125/wk | +$600 · +114.3% |
| Median rent | $200/wk | — | $0/wk | $200 · -100% |
| Median mortgage | $1,452/mo | — | $2,383/mo | +$931 · +64.1% |
| Average household size | 2.5 | 2.0 | 3.5 | +1 · +40% |
Change is measured from the earliest available Census year to 2021 for each metric.
Mount Observation trends (2016 → 2021)
Change since the previous Census. Historical figures are mapped from State Suburbs (SSC) to today's suburb boundaries.
Population
10
was 16 in 2016
-6 · -37.5%
Median age
39
was 41 in 2016
-2 · -4.9%
Dig deeper: Mount Observation population growth · Mount Observation then and now
2011 and 2016 values are mapped from State Suburbs (SSC) to 2021 suburb boundaries — see methodology.