Suburb profile · ABS Census 2021
Castletown suburb profile
Castletown, WA · Postcode 6450
This Castletown suburb profile summarises official Australian Bureau of Statistics Census 2021 data for Castletown, WA (postcode 6450). Use it as a free suburb report covering population, median rent, household income, age, housing tenure and employment, plus how those figures changed since Census 2016— then compare Castletown with nearby suburbs.
Castletown at a glance
Population
3,968
Median rent
$300/wk
Household income
$1,612/wk
Median age
38
Castletown trends (2016 → 2021)
Change since the previous Census. Historical figures are mapped from State Suburbs (SSC) to today's suburb boundaries.
Population
Census 2011 → 2016 → 2021
+6% over 10 years
Population
3,968
was 4,001 in 2016
-33 · -0.8%
Median rent
$300/wk
was $290/wk in 2016
+$10 · +3.4%
Household income
$1,612/wk
was $1,435/wk in 2016
+$177 · +12.3%
Median age
38
was 37 in 2016
+1 · +2.7%
Dig deeper: Castletown population growth · Castletown then and now
Castletown vs nearby & WA
Median Census 2021 figures for Castletown, nearby suburbs (8), and the WA state median (suburbs with 1,000+ people).
Rent
-14.3% vs area
- Castletown$300/wk
- Nearby$252.5/wk
- WA$350/wk
Household income
-12.4% vs area
- Castletown$1,612/wk
- Nearby$1,629/wk
- WA$1,841/wk
Median age
-2.6% vs area
- Castletown38
- Nearby43.5
- WA39
Personal income
-2.5% vs area
- Castletown$833/wk
- Nearby$727.5/wk
- WA$854/wk
Nearby uses the same postcode first, then larger suburbs in WA.
Socio-economic profile
How Castletown compares to other Australian suburbs on income, education and occupation — from official ABS SEIFA 2021 data.
Castletown sits around the national middle for socio-economic advantage. It shows lower education and occupation levels.
Relative disadvantage (IRSD)
Decile 5998.3
Lower score / decile = more relative disadvantage
Advantage & disadvantage (IRSAD)
Decile 4951.4
Higher score / decile = more relative advantage
Economic resources (IER)
Decile 41,008.2
Access to economic resources (income, housing)
Education & occupation (IEO)
Decile 2899.2
Education and occupational skill levels
Source: ABS SEIFA 2021. See methodology.
Castletown on the map
OpenStreetMap outline for Castletown, WA.
Map data © OpenStreetMap contributors. Boundary matching is approximate.
Castletown people
- Population
- 3,968
- Median age
- 38
- Born overseas
- 11.5%
- Average household size
- 2.4
Total usual residents (Census 2021)
Median age of residents in years
Percentage born outside Australia
Average number of people per household
Castletown income
- Median household income
- $1,612/wk
- Median personal income
- $833/wk
Median total weekly household income
Median total weekly personal income
Castletown housing
- Median rent
- $300/wk
- Median mortgage repayment
- $1,717/mo
- Separate houses
- 78%
- Flats & apartments
- 0.6%
- Owned outright
- 26.7%
- Mortgaged
- 29.5%
- Rented
- 25.8%
- Unoccupied dwellings
- 16.5%
Median weekly rent for rented dwellings
Median monthly mortgage repayment
Percentage of dwellings that are separate houses
Percentage of dwellings that are flats or apartments
Percentage of dwellings owned without a mortgage
Percentage of dwellings with a mortgage
Percentage of dwellings rented
Percentage of private dwellings unoccupied on Census night
Castletown work
- Employment to population
- 59.8%
- Unemployment rate
- 2.2%
- Year 12 or above
- 40.3%
Employed persons as a percentage of population aged 15+
Unemployed persons as a percentage of the labour force
Percentage with Year 12 or equivalent as highest school level
Nearby suburb profiles (near 6450)
Compare Castletown with nearby suburbs
Castletown in numbers
Castletown had 3,968 residents at the 2021 Census, making it the 232nd most populous suburb or locality in WA out of 1,594. The median age is 38, 5% below the typical WA suburb. The average household has 2.4 people. 11.5% of residents were born overseas.
Among occupied homes, 26.7% own their home outright, 29.5% are paying a mortgage, 25.8% rent. Separate houses make up 78% of dwellings, with 0.6% in flats or apartments. Median rent was $300/wk, 12% below the typical WA suburb.
Median household income was $1,612/wk, 10% below the typical WA suburb. The unemployment rate on Census night was 2.2%. 40.3% of adults had completed Year 12 or above. On the ABS SEIFA index of relative socio-economic disadvantage it sits in decile 5 nationally (1 is most disadvantaged, 10 least).
Between the 2016 and 2021 Censuses the population fell 0.8% (from 4,001 to 3,968). Median rent moved from $290/wk to $300/wk (+3.4%).
Castletown suburb FAQs
- What is the median rent in Castletown, WA?
- The median weekly rent in Castletown was $300/wk at the 2021 Census (ABS).
- How many people live in Castletown, WA?
- Castletown had 3,968 residents at the 2021 Census, down 0.8% from 2016.
- What is the median household income in Castletown?
- Median household income in Castletown was $1,612/wk at the 2021 Census.
- Do most people rent or own in Castletown?
- 25.8% of occupied homes in Castletown were rented, 26.7% were owned outright and 29.5% were owned with a mortgage.
About this Castletown suburb profile
Figures are from the ABS Census of Population and Housing 2021 (General Community Profile) for the Suburbs and Localities boundary matching Castletown. Where shown, 2016 values come from the 2016 State Suburbs (SSC) profile, linked via ABS geographic correspondence — boundaries are not always identical. Medians may be suppressed for very small areas. This is not financial or relocation advice — use it alongside current market data.
Source: ABS Census 2021. Methodology