Castletown

An assessment of population growth drivers in Castletown reveals an overall ranking slightly below national averages considering recent, and medium term trends

Based on analysis of ABS population updates for the broader area, and new addresses validated by AreaSearch, the suburb of Castletown's population is estimated at around 4,035 as of Feb 2026. This reflects an increase of 67 people (1.7%) since the 2021 Census, which reported a population of 3,968 people. The change is inferred from the resident population of 4,019 estimated by AreaSearch following examination of the latest ERP data release by the ABS in Jun 2024 and an additional 8 validated new addresses since the Census date. This level of population equates to a density ratio of 1,152 persons per square kilometer, which is relatively in line with averages seen across locations assessed by AreaSearch. Population growth for the suburb was primarily driven by natural growth that contributed approximately 54.0% of overall population gains during recent periods.

AreaSearch is adopting ABS/Geoscience Australia projections for each SA2 area, as released in 2024 with a base year of 2022. For any SA2 areas not covered by this data, and to estimate growth across all areas in the years post-2032, AreaSearch is utilising the growth rates by age cohort provided by the ABS in its latest Greater Capital Region projections released in 2023, based on 2022 data. As we examine future population trends, a population increase just below the median of regional areas across the nation is expected for the suburb, with an expected growth of 476 persons to 2041 based on aggregated SA2-level projections, reflecting an increase of 14.5% in total over the 17 years.

Residential development activity is lower than average in Castletown according to AreaSearch's national comparison of local real estate markets

Based on AreaSearch analysis, Castletown recorded approximately 14 residential properties granted approval annually. Over the past five financial years, from FY-21 to FY-25, around 70 homes were approved, with an additional six approved in FY-26 so far. On average, about 0.8 new residents per year arrived for each new home over these years, indicating that new supply is meeting or exceeding demand.

The average construction value of these properties was $486,000, suggesting a focus on the premium segment. This financial year has seen $20.2 million in commercial approvals, demonstrating moderate levels of commercial development. Compared to the Rest of WA, Castletown shows comparable development activity per person, maintaining market balance with the broader area, which is below average nationally, possibly due to planning constraints. Recent construction comprises 94% detached dwellings and 6% medium and high-density housing, preserving Castletown's suburban character focused on family homes.

With around 244 people per approval, Castletown reflects a low density area. Future projections estimate Castletown adding 586 residents by 2041, with development keeping pace with projected growth, although buyers may face increasing competition as the population expands.

Castletown has limited levels of nearby infrastructure activity, ranking in the 11thth percentile nationally

No changes can significantly affect an area's performance like modifications to local infrastructure, major projects, and planning initiatives. AreaSearch has identified a total of 0 projects that are likely to impact the area. Key projects include WA Police Satellite Technology Upgrade, Regional And Rural Wa Road Network Safety Improvements, WA Regional Digital Connectivity Program (WARDCP), and Western Australia Coastal Hazards Adaptation, with the following list detailing those most relevant.

Professional plan users can use the search below to filter and access additional projects.

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Employment conditions in Castletown demonstrate exceptional strength compared to most Australian markets

Castletown's workforce is balanced across white and blue collar jobs with varied sector representation. The unemployment rate was 1.9% in the past year. As of September 2025, 2,097 residents are employed, with an unemployment rate of 1.4%, below Rest of WA's 3.3%.

Workforce participation is similar to Rest of WA at 67.2%. Home workership was low at 4.4% based on Census responses, considering Covid-19 impacts. Leading industries include retail trade, transport, postal & warehousing, and health care & social assistance. Castletown specializes in transport, postal & warehousing with an employment share of 2.2 times the regional level, but mining is under-represented at 5.0% compared to Rest of WA's 11.7%.

The area offers limited local employment opportunities. In the 12 months ending May-25, employment increased by 0.3%, labour force by 0.8%, raising unemployment by 0.4 percentage points. This contrasts with Rest of WA where employment rose by 1.4% and unemployment fell by 0.2%. National employment forecasts from Jobs and Skills Australia project a 6.6% growth over five years and 13.7% over ten years. Applying these projections to Castletown's industry mix suggests local employment should increase by 5.5% over five years and 11.8% over ten years, assuming constant population projections.

Income levels align closely with national averages, indicating typical economic conditions for Australian communities according to AreaSearch analysis

AreaSearch's latest postcode level ATO data for the financial year ended 2023 shows that in Castletown, median income is $58,607 and average income stands at $76,108. This compares to Rest of WA's median income of $59,973 and average income of $74,392. Based on a 9.62% increase from the Wage Price Index since financial year 2023, estimated incomes as of September 2025 would be approximately $64,245 (median) and $83,430 (average). According to Census 2021 income data, household, family, and personal incomes in Castletown rank modestly, between the 42nd and 55th percentiles. Income distribution shows that 32.7% of residents earn between $1,500 and $2,999 weekly (1,319 residents), similar to the metropolitan region where 31.1% fall into this bracket. After housing costs, 85.3% of income remains for other expenses.

Castletown is characterized by a predominantly suburban housing profile, with ownership patterns similar to the broader region

Dwelling structure in Castletown, as evaluated at the latest Census held on 28th August 2016, comprised 93.6% houses and 6.3% other dwellings. In comparison, Non-Metro WA had 88.5% houses and 11.6% other dwellings. Home ownership in Castletown stood at 32.6%, with mortgaged dwellings at 35.7% and rented ones at 31.7%. The median monthly mortgage repayment was $1,717, higher than Non-Metro WA's average of $1,560. Median weekly rent in Castletown was $300, compared to Non-Metro WA's $265. Nationally, Castletown's mortgage repayments were lower than the Australian average of $1,863, and rents were substantially below the national figure of $375.

Castletown has a typical household mix, with a lower-than-average median household size

Family households account for 69.9% of all households, including 28.2% couples with children, 30.4% couples without children, and 10.4% single parent families. Non-family households constitute the remaining 30.1%, with lone person households at 27.6% and group households comprising 2.3%. The median household size is 2.4 people, which is smaller than the Rest of WA average of 2.5.

Castletown faces educational challenges, with performance metrics placing it in the bottom quartile of areas assessed nationally

The area's university qualification rate is 13.2%, significantly lower than Australia's average of 30.4%. This disparity presents both a challenge and an opportunity for targeted educational initiatives. Bachelor degrees are the most common, at 10.5%, followed by graduate diplomas (1.4%) and postgraduate qualifications (1.3%). Vocational credentials are prevalent among residents aged 15+, with 42.8% holding such qualifications, including advanced diplomas (8.6%) and certificates (34.2%).

Educational participation is high, with 31.6% of residents currently enrolled in formal education, comprising 12.9% in primary, 10.4% in secondary, and 1.5% in tertiary education.

Transport servicing is low compared to other areas nationally based on assessment of service frequency, route connectivity and accessibility

Public transport analysis reveals 34 active transport stops operating within Castletown. These stops are serviced by one individual route, collectively providing 15 weekly passenger trips. Transport accessibility is rated as excellent, with residents typically located 178 meters from the nearest transport stop. As of the 2021 Census, most residents commute outward and car remains the dominant mode at 94%. Vehicle ownership averages 1.6 per dwelling. A relatively low 4.4% of residents work from home.

Service frequency averages 2 trips per day across all routes, equating to approximately 0 weekly trips per individual stop.

Castletown's residents are healthier than average in comparison to broader Australia with a fairly standard level of common health conditions seen across both young and old age cohorts

Health data for Castletown shows positive outcomes overall, aligning with national benchmarks.

Common health conditions are seen across all age groups, with asthma and arthritis being most prevalent at 8.9 and 7.8% respectively. Approximately 69.2% of residents report no medical ailments, similar to the Rest of WA's 69.3%. Private health cover is high, with about 57% (~2,316 people) having it. Among working-age residents, health outcomes are typical. The area has 16.0% (645 people) aged 65 and over, lower than Rest of WA's 19.2%. Senior health outcomes rank higher than the general population nationally.

Castletown is considerably less culturally diverse than average when assessed alongside AreaSearch's national rankings for language and cultural background related metrics

Castletown, surveyed in June 2016, had below average cultural diversity with 85.5% citizens, 87.1% born in Australia, and 95.1% speaking English only at home. Christianity was the main religion at 42.2%. Judaism was not represented (0.0%) compared to Rest of WA's 0.0%.

Top ancestry groups were Australian (36.2%, regional average: 28.4%), English (30.7%), and Scottish (6.9%). Notable divergences included New Zealand (1.1% vs regional 0.9%), South African (0.8% vs 0.6%), and Maori (0.9% vs 1.0%).

Castletown's population aligns closely with national norms in age terms

The median age in Castletown is 37 years, which is lower than the Rest of WA figure of 40 and nearly matches Australia's median age of 38 years. Compared to the Rest of WA average, the 15-24 cohort is over-represented at 12.3% locally, while the 55-64 year-olds are under-represented at 10.1%. Between 2021 and present, younger residents have shifted the median age down by one year to 37 years. Specifically, the 35-44 age group has grown from 13.4% to 15.4%, while the 25-34 cohort increased from 12.2% to 14.1%. Conversely, the 45-54 cohort declined from 12.2% to 10.6%, and the 55-64 group dropped from 11.2% to 10.1%. Population forecasts for Castletown indicate substantial demographic changes by 2041. Notably, the 25-34 age group is projected to grow by 40% (an increase of 227 people), reaching 796 from its current figure of 568. Conversely, both the 15-24 and 5-14 age groups are expected to see reduced numbers.