Trigg (WA)

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According to investigations of ABS demographic updates for the wider region alongside newly verified addresses compiled by Districts since the Census, the suburb of Trigg has an estimated population of 3,206 as of May 2026. This represents a rise of 351 people (12.3%) from the 2021 Census, which recorded 2,855 residents. This adjustment is calculated from an Districts resident estimate of 3,203, which followed analysis of the ABS June 2025 ERP release, with 18 validated new addresses added since the Census. Such population numbers translate to a density of 1,347 persons per square kilometer, placing the suburb of Trigg above the average for locations evaluated nationally by Districts. The 12.3% rate of expansion since the 2021 census outpaced the national figure of 9.3%, positioning the suburb of Trigg as a regional growth leader. Population increases were mostly driven by overseas migration, which accounted for approximately 72.0% of total gains in recent times, though natural growth and interstate moves also contributed positively.

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Trigg has a highly qualified labor force with significant representation in professional roles, an unemployment rate of only 1.2%, and an annual employment growth rate estimated at 3.7% using aggregated statistical area data from Districts. As of March 2026, there are 1,840 employed residents, with the local unemployment rate sitting 3.0% below the Greater Perth figure of 4.2%, while the participation rate matches the regional benchmark of 70.2%. Census figures indicate that a moderate 15.9% of the workforce operated from home, though this may reflect temporary pandemic restrictions.

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According to the latest ATO statistics compiled by Districts for the 2023 financial year, local income levels rank in the top percentile nationwide. Taxpayers record a median income of $70,223 and an average income of $111,312, compared to $60,748 and $80,248 respectively in Greater Perth. Factoring in Wage Price Index growth of 10.93% since the 2023 financial year, estimated figures as of March 2026 would be around $77,898 for the median and $123,478 for the average. Census records show household, family, and individual incomes are all highly positioned, falling between the 86th and 94th percentiles nationally. Looking at income distribution, the top bracket of $4000+ weekly income contains 35.9% of residents (1,150 individuals), whereas the regional leader is the - range at . High-income earners are prominent, with earning more than per week, pointing to substantial financial capacity. After meeting mortgage or rent payments, households keep of their income, showing strong residual financial strength, and the area is placed in the th decile on the SEIFA index of economic resources.

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According to the latest Census, residential structures in Trigg consisted of 86.8% separate houses and 13.2% other housing types, including semi-detached homes and apartments, compared to 77.8% houses and 22.1% other options across metropolitan Perth. The rate of home ownership stood at 49.0%, which is considerably higher than the metropolitan average, while the remaining homes were being purchased with a mortgage (39.3%) or occupied by tenants (11.6%). The median monthly mortgage payment of $3,000 was substantially higher than the Perth metropolitan median of $1,907, while weekly rent was recorded at $485 compared to the metropolitan median of $350. Nationally, local mortgage costs are higher than the Australian median of $1,863, and rents sit well above the national median of $375.

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Families make up 78.0% of local households, consisting of couples with children at 41.9%, couples without children at 29.7%, and single parent families at 6.2%. The remaining 22.0% are non-family households, with single person households making up 18.4% and group households accounting for 3.5%. The median household size is 2.7 people, which is slightly larger than the Greater Perth average of 2.6.

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Educational attainment levels among residents are high, with 44.9% of those aged 15+ holding university degrees, compared to 27.9% across Western Australia and 29.0% in the wider SA4 region. This educational profile positions the workforce well for professional opportunities. Bachelor degrees are the most common higher qualification at 31.0%, followed by postgraduate degrees at 9.4% and graduate diplomas at 4.5%. Vocational training is also well represented, with 26.9% of residents aged 15+ holding technical qualifications, split between advanced diplomas at 11.5% and certificates at 15.4%.

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Public transport connectivity is supported by 12 active bus stops, serviced by 2 routes that facilitate a total of 356 weekly passenger trips. Accessibility is rated as good, with residents living an average of 233 meters from the nearest stop. Due to the residential nature of the suburb, most workers commute out of the area, with private cars remaining the primary travel mode at 86%, followed by trains at 7%. Vehicle ownership stands at 1.8 cars per household, which is higher than the regional average. A total of 15.9% of residents worked from home, according to 2021 Census data, which may reflect pandemic-related conditions.

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Health data shows highly favorable outcomes, based on Districts assessments of mortality and chronic disease rates, with a very low incidence of common health issues across all age brackets. Private health insurance coverage is exceptionally high, with approximately 71% of the population (2,288 people) holding policies, compared to 59.0% across Greater Perth and a national average of 55.7%.

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The population shows lower cultural diversity than average, with 77.3% of residents born in Australia, 92.0% holding citizenship, and 93.2% speaking only English at home. Christianity is the dominant religion, practiced by 51.8% of residents. The most distinct relative overrepresentation is found among followers of Judaism, who make up 0.2% of the community compared to 0.3% across Greater Perth.

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The median age of 43 years is older than the Greater Perth average of 37 and the national average of 38. The age distribution features a large proportion of residents in the 75 - 84 age group (8.6%), while the 25 - 34 cohort is smaller (7.7%) than in Greater Perth. Since 2021, the 75 to 84 cohort has increased from 6.7% to 8.6% of the population, whereas the 65 to 74 group decreased from 11.5% to 9.9%. Projections for 2041 indicate changes in the age profile, with the 85+ cohort expected to grow by 178 people (155%) from 115 to . Combined, cohorts aged and over will account for of total population growth, reflecting an aging trend, while declines are projected for the to and to age brackets.

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Trigg currently has an estimated 160 children under 5 years old, comprising approximately 89 children aged 0-2 and 59 children aged 3-4. This cohort grew by an estimated 10% since the previous census. though population forecasts indicate future decline, with an anticipated decrease of 2% by 2041 (to approximately 156 children). Meanwhile the 5-12 cohort currently amounts to 307. While growth has been positive birth rates observed in the area have been moderate, with approximately 8.9 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.