Williamstown (Vic.)

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According to investigations of ABS population revisions for the surrounding region, combined with fresh locations verified by Districts since the Census, the suburb of Williamstown (Vic.) has a population projected at approximately 15,027 as of May 2026. This represents a rise of 620 people (4.3%) since the 2021 Census, which documented a population of 14,407 people. The change is calculated from a resident population of 14,941, computed by Districts following analysis of the most recent ERP statistics from the ABS (June 2025) along with 232 validated new addresses since the Census date. This population scale translates to a density ratio of 2,693 persons per square kilometer, placing the area in the top quartile of domestic settings evaluated by Districts. The 4.3% expansion of the suburb of Williamstown (Vic.) since the census is within 2.5 percentage points of the SA3 area (6.8%), indicating strong growth dynamics. Population expansion for the locality was mainly supported by overseas migration, which made up roughly of all population increases during recent times.

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Williamstown features a highly qualified labor force with solid representation in professional services, an unemployment rate of only 2.0%, and a 2.0% estimated increase in jobs over the past year, according to Districts aggregations of statistical area data. As of March 2026, 9,151 residents are employed, while the jobless rate is 2.8% below the Greater Melbourne rate of 4.8%, and labor participation is relatively standard (73.8% compared to 70.2% in Greater Melbourne). Census returns indicate that a high 47.8% of residents worked from home, though the effects of Covid-19 lockdowns must be taken into account.

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The most recent postcode level ATO data from Districts for financial year 2023 indicates that income in the suburb of Williamstown ranks in the top percentile nationwide, with the median calculated at $69,801 and the average income reaching $107,492. This compares to Greater Melbourne's median income of $57,688 and average income of $75,164. Adjusting for Wage Price Index growth of 9.62% since financial year 2023, current estimates would be roughly $76,516 (median) and $117,833 (average) as of March 2026. According to the 2021 Census, household, family, and individual incomes are all highly ranked in Williamstown, placing between the 85th and 88th percentiles nationally. The statistics reveal that the largest segment accounts for 31.0% of residents (4,658 people) in the + bracket, contrasting with patterns across the metropolitan area where the - range is most common with . Economic affluence is demonstrated by of households earning high weekly incomes above which supports strong retail spending. Housing costs represent of income, while strong compensation places residents in the th percentile for disposable income, and the area's SEIFA income score falls in the th decile.

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Residential structures in Williamstown, as recorded at the most recent Census, consisted of 56.4% houses and 43.6% other properties (semi-detached dwellings, apartments, and alternative homes), compared to the Melbourne metro distribution of 67.9% houses and 32.1% other properties. At the same time, the rate of home ownership in Williamstown was significantly higher than the Melbourne metro level, standing at 40.9%, with the remaining properties being mortgaged (33.9%) or rented (25.1%). The median monthly home loan repayment in the area was significantly above the Melbourne metro average at $2,700, while the median weekly rent was registered at $450, compared to Melbourne metro figures of $2,000 and $390. Nationwide, Williamstown's mortgage obligations are much higher than the Australian average of $1,863, while rental costs are significantly above the national benchmark of $375.

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Family households represent the vast majority of homes at 72.8%, consisting of 36.5% couples with children, 26.1% couples without children, and 9.1% single parent households. Non-family living arrangements account for the remaining 27.2%, with single person households representing 25.9% and group living situations making up 1.4% of the total. The median household occupancy of 2.5 residents is slightly below the Greater Melbourne average of 2.6.

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Academic credentials in Williamstown are substantially higher than general averages, with 46.1% of residents aged 15+ holding university degrees, compared to 30.4% in Australia and 32.0% in the SA4 region. This high concentration of qualifications positions the local workforce well for knowledge-intensive roles. Bachelor degrees are the most common at 28.4%, followed by postgraduate degrees (12.2%) and graduate diplomas (5.5%). Vocational training paths represent 23.7% of qualifications for residents aged 15+ – consisting of advanced diplomas (10.8%) and certificates (12.9%).

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Analysis of transit options shows 67 active transport stops operating in Williamstown, consisting of various bus options. These stops are served by 4 unique routes, which together provide 4,770 weekly passenger trips. Transport connectivity is classified as outstanding, with residents living an average of 182 meters from their closest transport stop. Being a mostly residential area, the majority of workers travel outwards – cars remain the primary method at 79%, with 10% utilizing the train and 6% walking. Average vehicle ownership is 1.2 per home. A high 47.8% of residents work from home (2021 Census; potentially influenced by COVID-19 rules).

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Health indicators demonstrate excellent results for Williamstown, based on Districts' analysis of death rates and chronic illness prevalence, showing very low rates of common medical issues across all age bands, while the level of private health insurance is exceptionally high at approximately 69% of the overall population (10,383 people). This compares to 56.7% for Greater Melbourne and a national average of 55.7%.

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Williamstown displays higher than average levels of cultural diversity, with 23.3% of residents born abroad and 15.4% using a language other than English at home. The predominant religious affiliation in Williamstown is Christianity, representing 47.5% of the population. However, the most pronounced disproportion is found in Judaism, which makes up 0.2% of the local population compared to 1.0% across Greater Melbourne.

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The median age of 45 in Williamstown is much higher than Greater Melbourne's average of 37 and similarly older than the national median of 38 years. Relative to Greater Melbourne, Williamstown has a higher share of residents aged 55 - 64 (16.2%) but a smaller proportion of 25 - 34 year-olds (7.7%). This concentration of residents aged 55 - 64 is well above the national figure of 11.2%. Following the 2021 Census, the 75 to 84 cohort has expanded from 5.0% to 7.4% of the population, and the 15 to 24 age group increased from 11.8% to 13.5%. On the other hand, the 5 to cohort declined from to , and the to group fell from to . Projecting forward to demographic models point to major changes in Williamstown's age profile. Driven by demographic changes, the to cohort will expand by ( people), growing to from . Notably, the combined + age brackets will account for of total population growth, showing the area's aging population profile. In contrast, both the to and to age groups will experience declines in numbers.

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Williamstown currently has an estimated 540 children under 5 years old, comprising approximately 318 children aged 0-2 and 213 children aged 3-4. This cohort declined by an estimated 4% since the previous census. while population forecasts indicate future decline, with an anticipated decrease of 2% by 2041 (to approximately 530 children). Meanwhile the 5-12 cohort currently amounts to 1,400. Birth rates in the area have averaged 6.5 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.