Lewiston (SA)

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According to evaluation of ABS demographic releases for the wider region, and recent locations verified by Districts since the Census, the suburb of Lewiston has an estimated residency of approximately 3,726 as of May 2026. This indicates a rise of 451 people (13.8%) from the 2021 Census, which counted a population of 3,275 people. This shift is calculated from the resident numbers of 3,620, projected by Districts after examining the most recent ERP publication by the ABS (June 2025) and a further 121 validated new addresses since the Census date. Such population levels result in a density of 90 persons per square kilometer, offering substantial space per inhabitant and scope for subsequent expansion. The suburb of Lewiston's 13.8% growth since the 2021 census was higher than the state (7.5%), as well as Greater Adelaide, positioning it as a regional growth frontrunner. Local expansion was primarily driven by interstate migration, which accounted for roughly 79.0% of total demographic gains in recent times, though all components including natural growth and overseas migration registered positive trends.

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The suburb of Lewiston features a balanced job market comprising both professional and trade positions, with building services being particularly well represented, and an unemployment rate of just 3.8%, according to Districts compilations of regional statistics. As of March 2026, 1,768 local residents are employed, which matches the Greater Adelaide unemployment rate of 3.8%, though local labor participation is noticeably lower (60.9% compared to 66.6% in Greater Adelaide). Census data reveals a modest 9.1% of residents worked from their homes, although the influence of Covid-19 health restrictions should be kept in mind.

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According to the most recent postcode level ATO data published by Districts for financial year 2023, the suburb of Lewiston's median income among taxpayers is $50,824, with an average of $58,779. This sits below the national median and average, and compares to Greater Adelaide's median of $54,808 and average of $66,852. Factoring in Wage Price Index growth of 10.17% since financial year 2023, updated estimates point to approximately $55,993 (median) and $64,757 (average) as of March 2026. Based on 2021 Census records, household earnings sit in the 59th percentile ($1,910 weekly), while individual income sits in the 42nd percentile. Distribution statistics show that the $1,500 - 2,999 weekly bracket includes 40.6% of households (1,512 individuals), which aligns with broader regional trends showing in this bracket. After housing expenses, of income is available for other needs.

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Residential typology in the suburb of Lewiston, as measured in the most recent Census, consisted of 99.6% houses and 0.4% other formats (semi-detached, apartments, and alternative structures), compared to Adelaide metro's 75.2% houses and 24.9% other formats. At the same time, the rate of outright home ownership in the suburb of Lewiston was lower than the Adelaide metro level, sitting at 28.5%, with remaining properties either being purchased under a mortgage (65.2%) or rented (6.3%). The median monthly mortgage payment in the area stood above the Adelaide metro average at $1,690, while the median weekly rental cost was recorded at $330, compared to Adelaide metro figures of $1,562 and $320. On a national level, mortgage commitments in the suburb of Lewiston are lower than the Australian average of $1,863, while weekly rents are considerably lower than the national figure of $375.

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Families make up the vast majority of households at 80.4% of the total, consisting of 42.2% couples with children, 28.9% couples without children, and 8.9% single parent households. Non-family households account for the remaining 19.6%, with lone person households representing 17.1% and group living situations comprising 2.3% of the total. The median household occupancy of 2.9 people is higher than the Greater Adelaide average of 2.5.

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The locality displays low levels of tertiary education, with university graduation rates (9.6%) falling far below the Australian average of 30.4%. This highlights a clear need and opening for targeted educational programs. Bachelor degrees represent the largest segment at 6.6%, followed by graduate diplomas (1.6%) and postgraduate studies (1.4%). Vocational and technical expertise is highly prevalent, with 41.7% of residents aged 15+ holding trade credentials, consisting of advanced diplomas (8.9%) and certificates (32.8%).

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Health indicators demonstrate significant hurdles in the suburb of Lewiston, based on Districts assessments of mortality patterns and chronic illness prevalence across both younger and older residents, while the share of the population with private health insurance is relatively low at approximately 50% of the community (~1,872 people). This compares to 52.7% in Greater Adelaide and a national average of 55.7%.

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The suburb of Lewiston ranks low in terms of multicultural diversity, with 84.4% of inhabitants born in Australia, 92.4% holding citizenship, and 95.1% using only English in their households. Christianity is the primary religion, followed by 38.8% of the local population. However, the most pronounced difference is in Buddhism, which accounts for 1.1% of residents compared to 2.4% throughout Greater Adelaide.

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The median age of 41 years in the suburb of Lewiston is higher than Greater Adelaide's average of 39 and slightly above the national average of 38. The age distribution shows a high concentration of 55 - 64 year-olds (16.7%), while the 25 - 34 bracket is smaller (9.8%) than in Greater Adelaide. The proportion of 55 - 64 year-olds is well above the national level of 11.2%. Since 2021, the 35 to 44 age cohort has increased from 11.6% to 13.8% of the population, while the 75 to 84 cohort grew from 3.4% to 4.5%. In contrast, the 45 to 54 cohort fell from to . By demographic projections point to significant shifts in the age structure, with the to cohort expected to grow by people () from to .

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Lewiston currently has an estimated 178 children under 5 years old, comprising approximately 153 children aged 0-2 and 102 children aged 3-4. This cohort grew by an estimated 9% since the previous census. while population forecasts indicate future growth, with an anticipated increase of 24% by 2041 (to approximately 221 children). Meanwhile the 5-12 cohort currently amounts to 403. Recent growth has been driven by high birth rates observed in the area, with approximately 13.8 births per 1,000 residents recorded over the latest two-year period analysed which ranks the area among the top 20% of areas assessed nationally.