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Irwin
Western Australia · Western Australia - Outback (South) · 3,680 people · 12 suburbs · 1 postcodes
Irwin at a glance
Map shows the Irwin LGA boundary in blue with a marker per suburb. Hover for suburb name, click for details.
Marker colour reflects SEIFA IRSAD decile: ● 1-2 (most disadvantaged), ● 3-4, ● 5-6, ● 7-8, ● 9-10 (most advantaged).
Boundary source: ABS ASGS 2021. Map tiles: OpenStreetMap contributors.
Irwin is a Local Government Area in Western Australia, in the Perth region. It covers 12 suburbs across 1 postcodes and an area of 2,369 km². Irwin has a population of 3,680 , ranking #63 most populous in WA. The most populous suburb is Port Denison (1,452 residents), and the highest median household income is in Milo at $1,999/week. The LGA-wide median household income is $1,166/week and median age is 52.8. About 12.4% of residents were born overseas and 2.1% speak a language other than English at home.
Who lives here
Age structure
Show counts
| 0–14 years | 551 (15.0%) |
| 15–24 years | 303 (8.3%) |
| 25–44 years | 575 (15.7%) |
| 45–64 years | 1,132 (30.8%) |
| 65+ years | 1,109 (30.2%) |
How they live
Housing tenure
Dwelling type mix
Work and learning
Schools in Irwin
1 schools across Irwin: 100.0% Government, 0% Catholic, 0% Independent. The WA average is 71.4% / 14.1% / 14.5%. Schools here have a median ICSEA of 945 (range 945 to 945). WA median is 1006; national mean is 1000.
Sector mix
Type breakdown
ICSEA range
ICSEA (Index of Community Socio-Educational Advantage) summarises the socio-economic background of each school's families. Higher values indicate more advantage. Source: ACARA 2025.
All 1 schools in Irwin, sorted by enrolment:
| School | Sector | Type | Suburb | Students | ICSEA |
|---|---|---|---|---|---|
| Dongara District High School | Government | Combined | Dongara | 342 | 945 |
Source: ACARA School Profiles 2025. ICSEA shown where reported; some schools (notably small primaries) do not publish ICSEA.
SEIFA socio-economic indexes
SEIFA 2021 ranks Australian areas across four dimensions. Scores are population-weighted averages of suburb-level SEIFA scores within Irwin. Higher scores indicate more advantage; the national mean is 1000.
IRSAD
Relative socio-economic advantage and disadvantage
IRSD
Relative disadvantage only (lower = more disadvantaged)
IER
Economic resources: income, wealth, housing
IEO
Education and occupation: qualifications, skill levels
Suburbs in Irwin
Irwin contains 12 suburbs and 1 postcodes. Sorted by population.
| Suburb | Postcode | Population | Median income | Median age |
|---|---|---|---|---|
| Port Denison | 6525 | 1,452 | $1,027/wk | 56 |
| Dongara | 6525 | 1,393 | $1,092/wk | 51 |
| Springfield | 6525 | 276 | $1,625/wk | 50 |
| Bonniefield | 6525 | 217 | $1,416/wk | 51 |
| Bookara | 6525 | 149 | $1,542/wk | 48 |
| Irwin | 6525 | 72 | $1,312/wk | 55 |
| Yardarino | 6525 | 48 | $1,468/wk | 55 |
| Allanooka | 6525 | 19 | $1,875/wk | 43 |
| Arrowsmith | 6525 | 17 | $1,375/wk | 50 |
| Milo | 6525 | 16 | $1,999/wk | 40 |
| Mount Horner | 6525 | 13 | $1,875/wk | 52 |
| Mount Adams | 6525 | 8 | $1,374/wk | 55 |
Postcodes covered
Compare Irwin with neighbouring LGAs
Side-by-side demographic and socio-economic snapshot of Irwin and its closest neighbouring LGAs.
| LGA | Population | Median age | Median HH income | SEIFA IRSAD | % renting | % overseas-born |
|---|---|---|---|---|---|---|
| Irwin (WA) | 3,680 | 52.8 | $1,166/wk | 931 | 25.4% | 12.4% |
| Greater Geraldton | 39,670 | 40.5 | $1,642/wk | 942 | 30.6% | 14.2% |
Services and amenities
Frequently asked questions about Irwin
What is the population of Irwin?
The 2021 Census recorded 3,680 people living in Irwin, across 12 suburbs.
What suburbs are in Irwin?
Irwin contains 12 suburbs. The most populous are Port Denison, Dongara, Springfield, Bonniefield, Bookara.See the full list in the Suburbs section above.
What postcodes are in Irwin?
Irwin covers 1 postcodes: 6525.
What is the median household income in Irwin?
The population-weighted median household income across Irwin is $1,166 per week (2021 Census), ranking #113 of 123 WA LGAs.
How many schools are in Irwin?
Irwin has 1 schools, including 1 government, 0 Catholic, and 0 independent schools (ACARA 2025).
What is the SEIFA score for Irwin?
Irwin has a population-weighted SEIFA IRSAD score of 931, where the national average is 1000. Higher scores indicate more relative advantage.
Page last reviewed . Data sources: Australian Bureau of Statistics 2021 Census (CC BY 4.0), SEIFA 2021 (IRSD, IRSAD, IER, IEO), ACARA School Profiles 2025, ABS ASGS 2021 LGA boundaries. How this data is sourced.