Marmion (WA)

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Based on an assessment of ABS population statistics for the surrounding region, alongside new address points verified by Districts since the Census, the resident count in the suburb of Marmion is projected to be approximately 2,621 in May 2026. This represents an addition of 231 individuals (9.7%) compared to the 2021 Census, when the headcount stood at 2,390. This adjustment is calculated from a base resident population of 2,618, estimated by Districts using the ABS demographic update from June 2025, combined with 6 validated new addresses established post-Census. Such a population size results in a density of 2,279 persons per square kilometer, which exceeds the typical density of domestic locations analyzed by Districts. The growth rate of 9.7% since the 2021 census was quicker than the national benchmark of 9.3%, positioning the suburb as a local growth frontrunner. The upward trajectory was largely underpinned by arrival numbers from overseas, which accounted for roughly 85.0% of the aggregate demographic gains in recent times.

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The suburb of Marmion is home to a highly qualified workforce with a major concentration in professional services, an exceptionally low unemployment rate of 1.0%, and an annual job growth rate estimated at 3.4% according to Districts' compilation of regional statistical data. In March 2026, 1,446 local residents were employed, and the jobless rate was 3.2% lower than the Greater Perth rate of 4.2%, though participation in the labor force was slightly below average at 67.4% compared to the metropolitan benchmark of 70.2%. Census records indicate a moderate 16.0% of the workforce operated from home, though this figure may have been influenced by pandemic-related restrictions.

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Based on Districts' compilation of postcode-level ATO tax records for financial year 2023, taxpaying residents in the suburb of Marmion recorded a median income of $65,526 and an average income of $103,275. These figures sit within the highest national bracket, compared to Greater Perth figures of $60,748 and $80,248 respectively. Adjusting for a Wage Price Index expansion of 10.93% since financial year 2023, updated estimates point to a median of $72,688 and an average of $114,563 as of March 2026. From the 2021 Census, household, family, and individual incomes in the suburb of Marmion are positioned highly, placing between the 80th and 88th percentiles nationally. Income distribution shows that the $4,000+ weekly income bracket contains 30.8% of local earners, totaling people, which contrasts with the broader region where the - range is the most common at . The suburb displays notable wealth, with of earners bringing in more than weekly, which helps sustain high-end retail and local services. After paying for housing, households keep of their earnings, indicating strong disposable income, and the suburb's SEIFA income index places it in the th decile.

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The housing mix in the suburb of Marmion at the time of the latest Census consisted of 83.2% separate houses and 16.9% alternative dwellings, such as semi-detached homes, units, or other housing formats, compared to the Perth metropolitan averages of 77.8% houses and 22.1% alternative dwellings. Home ownership in the suburb of Marmion was much higher than the Perth metropolitan standard, standing at 48.7%, with the remaining properties being purchased under a mortgage (40.0%) or rented (11.4%). The median monthly home loan payment was $2,600, which is considerably higher than the Perth metropolitan average of $1,907, while the median weekly rental cost was $495, compared to the metropolitan median of $350. Nationally, mortgage costs in the suburb of Marmion are notably higher than the Australian median of $1,863, and weekly rents are well above the national median of $375.

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Families make up the vast majority of households at 81.4%, consisting of couples with children at 39.0%, couples without children at 32.2%, and single-parent households at 8.1%. Non-family households account for the remaining 18.6% of the area, with single-person households representing 17.5% and group share houses accounting for 1.8% of the total. The median household size of 2.7 individuals is slightly higher than the Greater Perth average of 2.6.

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Educational profiles in the suburb of Marmion are significantly higher than state and regional averages, with 40.3% of residents aged 15 and over holding a university degree, compared to 27.9% across Western Australia and 29.0% in the local SA4 area. This high concentration of tertiary qualifications positions the community well for professional, knowledge-based jobs. Bachelor degrees represent the largest segment at 28.6%, followed by postgraduate degrees at 7.3% and graduate diplomas at 4.4%. Vocational and technical skills are also common, with 31.1% of residents aged 15 and over holding qualification credentials, consisting of advanced diplomas at 10.9% and certificates at 20.2%.

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Public transport options in the suburb of Marmion consist of 9 active transit stops, which are served by local bus routes. These stops are connected to 2 distinct routes, providing a combined total of 480 passenger trips per week. Access to transit is good, with residents living an average of 214 meters from their nearest stop. Because it is a residential area, most workers commute out of the suburb, with private cars remaining the primary travel choice for 85% of workers, followed by 10% who commute by train. Car ownership is high, averaging 1.8 cars per home, which is above the metropolitan average. Additionally, 16.0% of residents work from home, based on 2021 Census figures which may reflect pandemic working conditions.

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Health data reveals excellent overall health outcomes in the suburb of Marmion, based on Districts' evaluation of mortality rates and chronic health conditions, which shows low rates of common health issues across all age demographics. The proportion of residents with private health insurance is high, sitting at approximately 68% of the population, which equals 1,787 people. This is higher than the Greater Perth average of 59.0% and the national rate of 55.7%.

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The suburb of Marmion has lower levels of cultural diversity than average, with 78.3% of the population born in Australia, 93.6% holding citizenship, and 94.6% using only English at home. The primary religion is Christianity, accounting for 50.9% of residents. The most noticeable disproportionate representation is seen in Judaism, which accounts for 0.3% of the population, matching the 0.3% rate across Greater Perth.

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The median age of 45 in the suburb of Marmion is higher than the Greater Perth average of 37 and older than the national median of 38. Compared to the wider Perth area, the suburb of Marmion has a higher percentage of people aged 65 to 74 at 12.6%, but a lower proportion of young adults aged 25 to 34 at 6.1%. Since the 2021 Census, the proportion of residents aged 75 to 84 has risen from 5.9% to 9.5%, and the 15 to 24 age bracket has grown from 10.6% to 12.2%. In contrast, the 65 to 74 cohort has fallen from 14.4% to 12.6%, and children aged to have decreased from to . Looking ahead to demographic forecasts suggest significant changes in the local age profile. The population aged and over is projected to grow by , adding people to reach compared to the baseline of . The combined age brackets from upward will make up of the overall population growth, pointing to a rapidly aging local profile. Conversely, the number of residents in the to and to age brackets is expected to decrease.

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Marmion currently has an estimated 91 children under 5 years old, comprising approximately 52 children aged 0-2 and 35 children aged 3-4. This cohort declined by an estimated 15% since the previous census. though population forecasts indicate future growth, with an anticipated increase of 1% by 2041 (to approximately 92 children). Meanwhile the 5-12 cohort currently amounts to 266. Birth rates in the area have averaged 5.9 per 1,000 residents over the latest two-year period, a low rate (among the bottom 20% of areas assessed nationally). This rate has slowed down slightly in recent years however.