Williamstown (SA)

Population growth drivers in Williamstown are slightly above average based on AreaSearch's ranking of recent, and medium term trends

Evaluating demographics from ABS updates for the region alongside fresh addresses validated by AreaSearch since the Census, the suburb of Williamstown (SA) has an estimated population of approximately 3,129 in May 2026. This indicates a growth of 148 people (5.0%) from the 2,981 residents reported in the 2021 Census. This adjustment is drawn from an estimated resident population of 3,124 calculated by AreaSearch using the ABS ERP release from June 2025 plus 14 validated new addresses added post-Census. With these figures, the density sits at 43 persons per square kilometer, offering residents substantial personal space. Over the last ten years, the suburb of Williamstown (SA) has shown steady expansion with a 0.9% compound annual growth rate, exceeding the SA4 average. Growth was mostly fueled by interstate migration, which accounted for roughly 40.0% of the total population increase, with overseas migration and natural growth also contributing positively.

Projections from ABS and Geoscience Australia released in 2024 using 2022 as the base year are utilized for each SA2 region. For SA2 regions lacking this data, or for periods after 2032, Regional/LGA age projections published by the SA State Government in 2023 based on 2021 numbers are applied, adjusted using a weighted aggregation method from LGA to SA2 boundaries. Anticipated demographic trends indicate that the suburb of Williamstown (SA) will experience growth exceeding the median rate of non-metropolitan Australia, with projections showing an increase of 486 persons by 2041, representing a total rise of 15.4% over the 16 years.

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

Based on analysis of ABS building permit figures distributed from regional data, the locality has seen an average of roughly 8 new home approvals annually, accumulating to approximately 44 dwellings over the preceding 5 financial years. Thus far in FY-26, 8 approvals have been registered. An average population gain of 2.4 new residents per built dwelling was observed between FY-21 and FY-25, highlighting a solid demand that supports property values. The average expected construction cost for these new homes stands at $381,000, indicating that builders are focusing on the higher-end market. Additionally, commercial approvals have reached $496,000 this financial year, pointing to a primary focus on residential building.

Compared against the Rest of SA, building activity in the area is notably low, tracking at 52.0% below the regional average per capita. This constrained supply typically helps maintain demand and supports the value of existing properties. Approval rates are also below the national average, reflecting the established status of the neighborhood and potential zoning restrictions. Furthermore, recent building approvals consist entirely of separate houses, maintaining the low-density profile of the area and appealing to buyers seeking detached residences. There are approximately 312 people for every home approval, pointing to a low-density residential environment.

Projections indicate that the locality is set to add 481 residents by 2041 based on the most recent quarterly estimates. If current building rates do not accelerate, residential supply may not keep pace with population growth, potentially increasing competition among buyers and supporting upward pressure on prices.

Williamstown has emerging levels of nearby infrastructure activity, ranking in the 30thth percentile nationally

Local infrastructure projects and planning changes significantly impact regional performance. No projects have been identified that are expected to influence this locality. Relevant regional initiatives include the Concordia Residential Development, the Barossa Growth and Infrastructure Investment Strategy, the Northern Adelaide Transport Study, and the SA Housing Trust Maintenance Contracts Review and Service Program.

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AreaSearch analysis of employment trends sees Williamstown performing better than 90% of local markets assessed across Australia

Williamstown features a well-rounded labor force that includes both white collar and blue collar occupations, with key service industries adequately represented, an unemployment rate of just 2.0%, and an estimated employment growth of 3.6% over the past year, according to AreaSearch aggregation of statistical area data. As of March 2026, 1,728 residents are employed, and the unemployment rate stands at 3.4% below the Regional SA rate of 5.5%, while workforce participation exceeds standard levels at 68.9% compared to Regional SA's 58.4%. Census data indicates that a low 10.0% of residents work from home, though the influence of Covid-19 lockdown measures should be taken into account.

Local employment is heavily weighted toward health care & social assistance, manufacturing, and construction. The community displays a distinct concentration in the construction sector, employing workers at a rate 1.6 times the regional average. Conversely, agricultural, forestry, and fishing activities occupy only 4.7% of the local workforce, which is lower than the 14.5% seen across Regional SA. Comparing the number of working residents to local job counts suggests a shortage of employment opportunities within the immediate area.

According to AreaSearch analysis of SALM and ABS data, aggregated from broader statistical areas, over the 12 months to March 2026, employment rose by 3.6% while the labour force grew by 3.3%, which led to a 0.3 percentage point decline in the unemployment rate. This trend stands in contrast to Regional SA, where employment increased by 1.2%, the labour force expanded by 2.6%, and unemployment climbed by 1.4 percentage points. Jobs and Skills Australia's national employment forecasts from May-25 provide additional context for anticipated future demand in Williamstown. These projections, spanning five and ten year periods, have been aligned with the local employment profile to project growth trajectories. Although national employment is projected to grow by 6.6% over five years and 13.7% over ten years, expansion rates vary considerably across industry sectors. When these sector-specific forecasts are applied to Williamstown's employment composition, local employment is anticipated to rise by 5.7% over five years and 12.4% over ten years (please note this is a simple weighting extrapolation for illustrative purposes and does not take into account localised population projections).

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

Taxpayer data from the ATO for the 2023 financial year indicates that the median income in the locality was $54,998, with the average income recorded at $63,575. These figures are below the national averages and compare to a median of $48,920 and an average of $58,933 across Regional SA. Adjusting for a 10.17% increase in the Wage Price Index since the 2023 financial year, estimated incomes as of March 2026 would be approximately $60,591 for the median and $70,041 for the average. Census data places household, family, and individual incomes around the 51st percentile nationwide. Income distribution shows that the $1,500 - 2,999 weekly bracket accounts for 36.0% of the population (representing 1,126 residents), which aligns with the regional trend of 27.5% in this bracket. Residents retain 87.3% of their earnings after meeting housing expenses, showing good disposable income, and the area ranks in the 5th decile of the SEIFA index.

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

According to the latest Census, the housing stock consisted of 99.1% separate houses and 0.9% other property types like townhouses and units, whereas Regional SA recorded 88.5% houses and 11.5% other dwellings. The rate of outright home ownership stood at 33.4%, which is lower than the Regional SA average, with the remaining properties occupied by residents with a mortgage (55.4%) or renting (11.3%). The median monthly mortgage payment of $1,500 was notably higher than the Regional SA median of $1,153, while the median weekly rent was $300, compared to $220 across Regional SA. On a national level, mortgage costs are lower than the Australian average of $1,863, and rent levels are also below the national benchmark of $375.

Williamstown features high concentrations of family households, with a higher-than-average median household size

Families make up the majority of households at 79.5%, consisting of 38.1% couples with children, 31.8% couples without children, and 9.0% single parents. Non-family living arrangements account for the remaining 20.5%, with single-person households representing 19.8% and group homes making up 0.9% of the total. The median household size of 2.7 individuals is larger than the Regional SA average of 2.3.

Williamstown shows below-average educational performance compared to national benchmarks, though pockets of achievement exist

Educational statistics indicate lower levels of tertiary attainment, with university completion rates at 17.5% compared to the national average of 30.4%. Among those with university degrees, bachelor degrees account for 12.8%, followed by graduate diplomas at 2.6% and postgraduate degrees at 2.1%. Practical and technical vocations are highly represented, with 43.1% of residents aged 15 and over holding vocational qualifications, split between advanced diplomas at 10.7% and certificates at 32.4%.

A high level of enrollment in study is observed, with 27.3% of the population currently participating in formal education. This comprises 12.0% in primary schools, 7.8% in high schools, and 3.0% in higher education institutions.

No public transport data available for this catchment area.

Williamstown'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

Local health metrics show favorable outcomes, with analysis of mortality rates and chronic conditions aligning closely with national averages across different age demographics. The percentage of the population holding private health insurance is slightly above the average SA2 area at approximately 52%, representing about 1,631 residents, compared to 48.9% in Regional SA.

Asthma and arthritis are the most prevalent health issues, affecting 8.9% and 8.8% of the community, respectively, while 66.3% of residents reported having no chronic medical conditions, compared to 62.5% across Regional SA. Health profiles among working-age individuals are standard. Residents aged 65 and over represent 18.1% of the population (566 people), which is lower than the Regional SA average of 27.1%. Senior health outcomes are positive, with national standings matching those of the wider population.

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

Cultural diversity metrics are low, with 84.8% of the population born within Australia, 93.6% holding citizenship, and 98.1% speaking only English at home. Christianity is the primary religious affiliation, representing 37.9% of residents. In contrast, Jewish affiliation represents a zero value, matching the zero value recorded across Regional SA.

The most common ancestry backgrounds reported are English at 35.3%, Australian at 32.1%, and German at 9.1%. Certain other ethnic backgrounds show unique representation levels compared to the region, including Dutch at 1.8% (compared to 1.3% regionally), Maltese at 0.4% (compared to 0.2%), and Macedonian at 0.1% (compared to a zero value regionally).

Williamstown's median age exceeds the national pattern

The median age is 42, making the population younger than the Regional SA average of 47 but older than the national median of 38. Children aged 5 to 14 represent 14.3% of the community, which is a strong share compared to Regional SA, while the 65 to 74 age bracket is less common at 9.9%. Post-2021 Census estimates indicate the 75 to 84 cohort has expanded from 4.0% to 5.7%, and the 15 to 24 group grew from 11.4% to 13.1%. Meanwhile, the 45 to 54 cohort fell from 15.1% to 13.6%. By 2041, demographic adjustments are expected, led by a 28% increase in the 65 to 74 population, which is projected to rise by 85 people to reach 395 from 309. The 5 to 14 group is projected to see a smaller 3% growth, adding 14 people.