Boulder (WA)

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Based on demographic evaluations from the ABS for the surrounding territory, along with newly verified addresses from Districts post-Census, the suburb of Boulder has an estimated population of 5,283 as of May 2026. This represents a gain of 411 residents (8.4%) relative to the 2021 Census, which counted 4,872 individuals. This shift is calculated from a resident base of 5,278, which Districts projected using the most recent ABS ERP statistics from June 2025 plus 26 validated new addresses registered after the Census. This population level yields a density of 1,200 persons per square kilometer, matching typical averages recorded across regions reviewed by Districts. The 8.4% expansion rate in the suburb of Boulder since the 2021 census outpaced the SA3 territory (7.5%) and the SA4 territory, positioning it as a local growth frontrunner. Natural increase was the primary contributor, accounting for roughly 55% of all population increases in recent times.

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The suburb of Boulder has a diverse workforce distributed across professional and industrial jobs, with strong representation in production and manufacturing, an unemployment rate of just 3.9%, and a 2.9% rise in estimated jobs over the last year according to regional data compiled by Districts. In March 2026, 2,791 residents were employed, while the jobless rate was 0.4% higher than the Regional WA figure of 3.5%, and labor participation was relatively typical at 70.1% compared to 65.6% in Regional WA. Census records indicate a minor 2.4% of working residents operated from home, though the influence of pandemic lockdowns should be noted.

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According to the latest postcode ATO statistics for the 2023 financial year, the suburb of Boulder has a median taxpayer income of $66,394 and an average of $78,694. This sits well above the national benchmark, comparing to a median of $59,973 and an average of $74,392 in Regional WA. Factoring in Wage Price Index growth of 10.93% since the 2023 financial year, current figures are estimated at roughly $73,651 for the median and $87,295 for the average as of March 2026. The 2021 Census highlights that individual weekly earnings ($1,019) place in the 80th percentile nationally. The $1,500 - 2,999 bracket is the most common, containing 38.5% of residents (2,033 people), which matches the broader region where this group accounts for . After meeting housing costs, households keep of their earnings, demonstrating strong spending capacity.

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At the time of the last Census, residential housing in the suburb of Boulder consisted of 81.9% separate houses and 18.1% alternative dwellings (townhouses, flats, and other structures), compared to 88.5% houses and 11.6% alternative structures across Regional WA. Home ownership rates in the suburb of Boulder lagged behind Regional WA at 22.0%, with the remaining properties being mortgaged (42.8%) or occupied by tenants (35.2%). The median monthly home loan payment was significantly below the Regional WA average at $1,302, while the median weekly rental cost was $300, compared to $1,560 and $265 in Regional WA. Nationally, mortgage costs in the suburb of Boulder are much lower than the Australian average of $1,863, and rents are substantially below the national median of $375.

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Families make up 65.0% of all households, consisting of 26.8% couples with children, 23.2% couples without children, and 13.3% single parent households. Non-family households represent the remaining 35.0%, with single-person households at 30.2% and share houses at 4.8% of the total. The median household size is 2.4 residents, slightly below the Regional WA average of 2.5.

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Educational metrics point to low rates of higher education, with university graduation rates at 9.3%, well below the national average of 30.4%. This presents a challenge as well as a target for focused educational programs. Bachelor degrees are the most common higher qualification at 7.1%, followed by postgraduate studies at 1.3% and graduate diplomas at 0.9%. Practical and vocational skills are prominent, with 47.2% of residents aged 15 and over holding vocational qualifications, including advanced diplomas at 7.5% and certificates at 39.7%.

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Public transit records show 39 transit stops operating in the suburb of Boulder, consisting of various bus options. These stops are served by 5 distinct routes, which combine to offer 132 passenger journeys per week. Access to transit is classified as good, with residents living an average of 220 meters from the nearest stop. Due to the area's residential nature, most workers travel outward to work, with cars remaining the main transit mode at 91%. Households own an average of 1.6 vehicles. A low 2.4% of workers worked from home, according to the 2021 Census, which may reflect pandemic-era conditions.

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The suburb of Boulder faces noticeable health concerns based on mortality figures and chronic disease rates, with common conditions present across both younger and older demographics, while the share of residents with private health insurance is unusually high at roughly 58% of the population (3,087 people), compared to 56.4% in Regional WA.

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The suburb of Boulder is close to regional averages for ethnic diversity, with 72.0% of residents holding citizenship, 78.2% born in Australia, and 89.9% speaking only English at home. Christianity is the primary religion, followed by 40.3% of the community. The most distinct relative overrepresentation is seen in Buddhism, which accounts for 1.3% of residents compared to 1.0% across Regional WA.

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Having a median age of 34, the suburb of Boulder is notably younger than Regional WA (40 years) and below the national median of 38 years. The 25 - 34 demographic has a high concentration at 17.3% compared to Regional WA, while the 75 - 84 age bracket is less common at 2.8%. Since 2021, the 25 to 34 age bracket has risen from 15.2% to 17.3% of the population, and the 15 to 24 group has expanded from 11.9% to 13.3%. Conversely, the 45 to 54 group dropped from 13.0% to 11.0%. Looking toward 2041, forecasts point to major changes in the age profile of the suburb of Boulder. Leading these changes, the to bracket is projected to grow by ( people), rising to from . Meanwhile, the numbers of residents in the to and to brackets are expected to decrease.

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Boulder currently has an estimated 369 children under 5 years old, comprising approximately 207 children aged 0-2 and 137 children aged 3-4. This cohort grew by an estimated 2% since the previous census. while population forecasts indicate future growth, with an anticipated increase of 21% by 2041 (to approximately 448 children). Meanwhile the 5-12 cohort currently amounts to 583. While growth has been positive birth rates observed in the area have been moderate, with approximately 11.3 births per 1,000 residents recorded over the latest two-year period analysed which ranks the area within the middle tier nationally. This rate has slowed down slightly in recent years however.