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Population forecast for Western Australia
Our 2025 population forecast for Western Australia, and the starting point for the forecasts of its 10 regions.
- State
- Western Australia
- Regions
- 10, each forecast individually
- Base
- ABS ERP June 2024
- Built on
- 2025 national forecast (2021.2024.3)
- Status
- Current
- Boundaries
- ASGS 2021 Ed. 3
- Horizon
- 2046
The forecast
2,749,365
Population, 2021
3,933,777
Population, 2046
+1,184,412
Total growth to 2046
13.8%
Share of national growth
+491,387
Additional dwellings
21.7%
Aged 65 and over, 2046
10
Regions forecast individually
Age structure
| Age group | 2021 | 2046 | Change, percentage points |
|---|---|---|---|
| Aged 0–14 | 19.3% | 16.3% | −3.0 |
| Aged 15–64 | 65.0% | 62.0% | −3.0 |
| Aged 65 and over | 15.7% | 21.7% | +6.0 |
Western Australia's population, 2021 to 2046
Our 2025 forecast, by year (at 30 June).
- Our forecast · 3.93m (our forecast)
Source: Informed Decisions, National Forecasting Program, 2025 forecast. 2021 to 2024 are ABS estimated resident population.
+ Show the data− Hide the data
| Year | Our forecast |
|---|---|
| 2021 | 2.75m |
| 2026 | 3.09m |
| 2031 | 3.31m |
| 2036 | 3.53m |
| 2041 | 3.74m |
| 2046 | 3.93m |
Download the full series (CSV)
Informed Decisions, National Forecasting Program, 2025 forecast
Where Western Australia sits
- NationAustralia+8.6m to 2046Population growth, 2021 to 20462025 forecast
- You are here: StateWestern Australia+1.18m to 204613.8% of national growth2025 forecast
- Below the state10 regions, forecast individuallyThe largest growth is forecast for Perth – South East. Each region carries its own release.
Western Australia's share of national growth is set from the national drivers. How it is distributed inside Western Australia is built from development assessed on the ground, region by region.
What we assess, and where
Different things drive population change at different scales. We form a view at each level, and each level constrains the one below it.
- Nation
- Net overseas migration
- Fertility and life expectancy
- Housing completions
- State (this page)
- Share of overseas migration
- Interstate migration
- State housing and planning policy
- Economic conditions
- Region
- Intrastate migration
- Development pipeline
- Capacity and limiting factors
- Ageing in place
- Suburb and site
- Site-by-site development assessment
- Dwelling type and density
- Local capacity
Components of population change, 2021 to 2046
| Component | 2021 to 2046 |
|---|---|
| Births | +936,008 |
| Deaths | −619,265 |
| Natural increase | +316,743 |
| Net overseas migration | +755,678 |
| Net interstate migration | +111,991 |
| Total change | +1,184,412 |
Regional forecasts for Western Australia
| Region | Population, 2021 | Population, 2046 | Growth to 2046 | Version |
|---|---|---|---|---|
| Bunbury | 194,976 | 284,024 | +89,048 | 2021.2024.3.1.2 · Aug 2026 |
| Mandurah | 111,295 | 183,969 | +72,674 | 2021.2024.3.1.2 · Aug 2026 |
| Perth – Inner | 188,755 | 254,428 | +65,673 | 2021.2024.3.1.1 · Mar 2026 |
| Perth – North East | 286,691 | 419,150 | +132,459 | 2021.2024.3.1.1 · Oct 2025 |
| Perth – North West | 596,988 | 857,773 | +260,785 | 2021.2024.3.1.1 · Apr 2026 |
| Perth – South East | 549,135 | 824,389 | +275,254 | 2021.2024.3.1.1 · Feb 2026 |
| Perth – South West | 458,974 | 698,218 | +239,244 | 2021.2024.3.1.3 · Dec 2025 |
| Western Australia – Outback (North) | 96,943 | 117,564 | +20,621 | 2021.2024.3.1.1 · May 2026 |
| Western Australia – Outback (South) | 123,991 | 138,454 | +14,463 | 2021.2024.3.1.1 · May 2026 |
| Western Australia – Wheat Belt | 141,617 | 155,808 | +14,191 | 2021.2024.3.1.1 · Jun 2026 |
Our forecasting team
Common questions about the forecast for Western Australia
A credible, independent forecast
Independent of government
Our forecasts are not commissioned by any government, so they give an independent view.
Granular forecasts for custom catchments
Forecast at small-area level, so they can be built up into any catchment you need, such as a school catchment, a retail trade area or a utility service area.
Every region, on one basis
A single national model, not a collection of unconnected local studies.
Assessed site by site
Built on a national development sites layer maintained by our own forecasters.
500+
organisations across Australia trust Informed Decisions for data and insights
15,000+
suburbs forecast, covering every part of Australia
A named forecaster behind every region
Questions about a forecast go to the team who prepared it.
See the forecast for your exact area
Placemaker is our mapping and reporting platform for population, housing and development. Draw any catchment in Western Australia and get the forecast for it, by single year, with age and sex detail and the development pipeline behind it.