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ABS 2021 Census · Updated 21 May 2026
Mount Observation is a regional centre in South Australia, Australia, with a population of approximately 10, making it a boutique locality. Located approximately 49 km from the Adelaide CBD, Mount Observation is a regional area in South Australia. The median household income is $117,000 per year.
Strong household incomes in Mount Observation underpin solid property demand. Regional positioning means lower entry costs but potentially longer hold periods for capital gains.
Official Australia Post postcode for Mount Observation. A postcode may cover multiple suburbs.
Australia Post Postcode Finder →Usual resident population at the most recent census.
Weekly median rent for occupied homes. Live rental data integration coming soon.
Annual median household income (before tax) across all households.
Straight-line distance from the suburb centroid to the nearest capital city CBD. Actual driving distance will be longer.
Estimated 1 school within or near this suburb.
Find schools near Mount Observation on My School →Estimated 1 park and green spaces near this suburb.
Monthly median mortgage repayment for households currently paying off a mortgage.
Proportion of separate houses versus units, townhouses, and other home types. Useful for investors assessing rental demand mix.
Mount Observation is a smaller community of 10 — about 0% of the South Australia suburb median (3,699) — so investors should factor in the narrower buyer pool and longer average time-on-market. Median household income of $117,000/year runs 45% above the South Australia suburb median of $80,964, indicating strong purchasing power and the type of demographic profile that tends to sustain premium property prices through market cycles. At 49 km from Adelaide, Mount Observation is an outer-metro location where buyers are typically trading commute time for floor space and a lower entry price. Only 50% of dwellings are separate houses (vs 73% state median), so this is a unit-heavy market where body-corporate decisions and strata supply meaningfully shape investor returns.
How Mount Observation stacks up against the median of all South Australia suburbs in our dataset. Positive values mean Mount Observation sits above the state median; negative means below.
| Metric | Mount Observation | SA median | Δ vs state |
|---|---|---|---|
| Population | 10 | 3,699 | -100% |
| Median household income | $117,000/yr | $80,964/yr | +45% |
| Median mortgage (monthly) | $2,383 | $1,616 | +47% |
| Distance to CBD | 49 km | 13 km | +277% |
| Separate houses | 50% | 73% | -23pp |
Pre-inspection briefing for Mount Observation — every item is derived from public datasets, with full citations in our data sources page.
Limited buy-and-hold upside: a small population of 10 means liquidity is thin and capital growth tends to lag the wider South Australia market over full cycles.
Median rental data was not captured for Mount Observation. Use current realestate.com.au and Domain listings to triangulate a realistic weekly rent before committing, then feed that number into our rental yield calculator.
Only 50% of dwellings are separate houses (vs 73% SA median) — this is a unit and townhouse market, where cosmetic flips struggle against body-corporate restrictions, thinner after-reno uplift and competing new supply.
Run the numbers on a Mount Observation property
Scenario comparison, cash flow analysis, tax modelling, and PDF export — all in one place.
Create free account →Capital-growth expectations for Mount Observation are modest for 2026 — incomes 45% above the SA median of $80,964 and a population of 10 suggest gains will lag headline metro markets. Rental fundamentals will need to be verified against live listings, as a clean median rent was not recorded for Mount Observation. The EquitySight investment score of 55/100 places Mount Observation in the mid tier of Australian suburbs we profile, and overall investor sentiment is balanced heading into the second half of 2026.
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Mount Observation scores 55/100 on our EquitySight investment framework — a moderate rating. That score is driven by a population of 10, median household income of $117,000/year. Whether it fits your portfolio depends on whether you are targeting cash flow, capital growth, or a value-add renovation — all three are scored with suburb-specific numbers elsewhere on this page.
The main demand drivers in Mount Observation are an above-state-median household income of $117,000/year, a dwelling mix that is 50% separate houses, roughly 1 schools and 1 parks within the catchment. Together these shape both owner-occupier and tenant demand and are the factors we weight most heavily in the suburb's investment score.
Mount Observation has a usual resident population of approximately 10, compared with a South Australia suburb median of 3,699 — placing it in the lower half of the state's suburbs by size. Population is the clearest proxy for market depth: more residents mean more transactions and typically a shorter average days-on-market on resale.
Mount Observation sits 49 km straight-line from the Adelaide CBD. This is an outer-metro location; local employment and infrastructure announcements tend to move prices more than CBD connectivity alone.
A reliable median rent was not captured for Mount Observation. Benchmark expected weekly rent on realestate.com.au and Domain, or the state rental tribunal's rent dashboard. Most Australian investors target a 4–5% gross yield as a baseline.
The median monthly mortgage repayment in Mount Observation is $2,383, or approximately $28,596/year (vs $1,616/month state median). Stress-test your own borrowing at rates 1–2 percentage points above today's to make sure you can still service the loan through an RBA tightening cycle.
Census data was not complete enough in Mount Observation to compute a clean rent-to-mortgage coverage. Use current listings to benchmark weekly rent, then plug your expected purchase price into our rental yield calculator to see whether the investment runs cash-flow positive or negative.
The main risks are a thin buyer pool (10 residents), interest-rate sensitivity on the $2,383 median mortgage, the broader South Australia market cycle. Each of these is covered in the Risk Factors section above with suburb-specific numbers rather than generic warnings.
Every number on this page comes from the ABS 2021 Census of Population and Housing, Australia Post postcode reference data, and OpenStreetMap amenity tiles. The investment score, strategy verdicts, and comparison table are computed deterministically from those inputs — no opinion, no estimation. See our full methodology and the data sources and licences for the formulas we use.