Klemzig (SA)

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According to investigations of ABS population updates for the wider region and new addresses validated by Districts since the Census, the resident count of Klemzig is estimated to be approximately 6,627 as of May 2026. This represents a drop of 86 individuals (1.3%) compared to the 2021 Census, which counted 6,713 individuals. This shift is deduced from a resident population of 6,611, estimated by Districts using the ABS ERP data release from June 2025 and 30 validated new addresses added after the Census date. The suburb of Klemzig has a density ratio of 2,640 persons per square kilometer, placing it in the top quarter of national locations analysed by Districts. Overseas migration was the primary driver of population growth, accounting for approximately 74.0% of recent population increases.

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Klemzig has a workforce with high levels of education and strong representation in essential services, alongside an unemployment rate of just 3.1%, according to statistical area data compiled by Districts. In March 2026, 3,489 residents were employed, and the unemployment rate was 0.7% lower than the Greater Adelaide rate of 3.8%. Workforce participation was slightly lower than the benchmark, standing at 64.6% compared to 66.6% in Greater Adelaide. Census data showed that a low proportion of residents (10.4%) worked from home, though this may have been influenced by COVID-19 restrictions.

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The most recent postcode-level ATO statistics from Districts for financial year 2023 show that incomes in Klemzig are below the national average, with a median of $51,027 and an average of $57,497. In comparison, Greater Adelaide recorded a median income of $54,808 and an average of $66,852. Factoring in Wage Price Index growth of 10.17% since financial year 2023, current estimates would be approximately $56,216 for the median and $63,344 for the average as of March 2026. According to Census data, Klemzig ranks modestly for household, family, and personal incomes, placing between the 35th and 42nd percentiles. The data indicates that 33.4% of the population (2,213 individuals) earn between $1,500 and $2,999, mirroring the metropolitan area where 31.8% of the population fall into this bracket. Housing affordability presents a significant challenge, with only of income remaining after housing costs, ranking in the th percentile, while the SEIFA income index places the area in the th decile.

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Residential structure in Klemzig at the last Census consisted of 68.3% houses and 31.7% other housing types like semi-detached properties, units, and alternative dwellings, compared to 75.2% houses and 24.9% other dwellings in metropolitan Adelaide. Home ownership in Klemzig lagged behind the metropolitan average, standing at 27.0%, while the remaining properties were mortgaged (30.7%) or rented (42.3%). The median monthly mortgage payment was higher than the Adelaide metropolitan average at $1,684, whereas the median weekly rent was $300, compared to metropolitan figures of $1,562 and $320. Nationally, Klemzig's mortgage repayments are below the Australian average of $1,863, and weekly rents are considerably lower than the national figure of $375.

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Families make up 62.4% of all households, consisting of 27.7% couples with children, 23.9% couples without children, and 9.2% single-parent households. Non-family households account for the remaining 37.6%, with single-person households representing 32.2% and group households making up 5.6% of the total. The median household size of 2.3 individuals is smaller than the Greater Adelaide average of 2.5.

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Academic achievement in Klemzig is higher than regional benchmarks, with 41.3% of residents aged 15+ holding a university degree, compared to 19.8% in the SA4 region and 25.7% statewide. This high concentration of tertiary education positions the local workforce well for knowledge-intensive roles. Bachelor degrees are the most common at 25.3%, followed by postgraduate degrees (12.9%) and graduate diplomas (3.1%). Vocational and technical education is also common, with 25.8% of residents aged 15+ holding trade credentials, consisting of advanced diplomas (10.2%) and certificates (15.6%).

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Public transport data shows 35 active transit stops in Klemzig, consisting of bus services. These stops serve 56 routes, providing a total of 3,532 weekly passenger trips. Transport access is rated as good, with residents living an average of 219 meters from their nearest stop. Because Klemzig is primarily residential, most workers commute out of the suburb, with private cars being the main transport mode at 78% and buses at 17%. Vehicle ownership stands at 1.1 per household, below the regional average. A relatively low 10.4% of residents worked from home, based on the 2021 Census, which may reflect the pandemic context.

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Health metrics point to below-average outcomes in Klemzig according to Districts' evaluation of mortality and chronic disease rates, although the prevalence of general health issues is standard, despite being higher than the national average for older groups. Private health insurance coverage is relatively low, held by approximately 50% of the population (~3,297 people), compared to 52.7% in Greater Adelaide and a national average of 55.7%.

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Klemzig has a high level of cultural diversity, with 42.3% of the population born outside Australia and 42.7% speaking a non-English language at home. Christianity is the most common religion, representing 42.2% of residents. Hinduism is notably overrepresented, accounting for 11.7% of the population, which is much higher than the Greater Adelaide average of 2.8%.

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The median age of 36 years in Klemzig is slightly below the Greater Adelaide average of 39 and the national median of 38. Compared to Greater Adelaide, Klemzig has a larger share of residents aged 25 - 34 (19.5%) and a smaller share aged 65 - 74 (7.4%). Since the 2021 Census, the 35 to 44 age cohort has increased from 16.0% to 17.1% of the population, while the 0 to 4 group has decreased from 6.7% to 5.7%. By 2041, demographic shifts will alter the age profile, with the 45 to 54 group projected to grow by 30% (206 people), rising from to while the to group is expected to grow by , adding just residents.

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Klemzig currently has an estimated 377 children under 5 years old, comprising approximately 243 children aged 0-2 and 161 children aged 3-4. This cohort declined by an estimated 16% since the previous census. though population forecasts indicate future growth, with an anticipated increase of 5% by 2041 (to approximately 396 children). Meanwhile the 5-12 cohort currently amounts to 624. Birth rates in the area have averaged 13.5 per 1,000 residents over the latest two-year period, a high rate (among the top 20% of areas assessed nationally). This rate has slowed down slightly in recent years however.