North Plympton (SA)

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Analysis of ABS population figures for the surrounding region, combined with post-Census address validation by Districts, indicates the population of the suburb of North Plympton has reached approximately 4,248 as of May 2026. This represents a gain of 638 people (17.7%) compared to the 2021 Census, which recorded 3,610 residents. The updated total is based on a resident population estimate of 4,240 calculated by Districts using the June 2025 ABS ERP release, supplemented by 40 validated new addresses added after the Census. This population level corresponds to a density of 2,794 persons per square kilometer, placing the suburb of North Plympton in the highest quarter of all Australian locations analyzed. The 17.7% rate of expansion since the 2021 census outpaced both the statewide growth of 7.5% and the local SA3 area, establishing the suburb of North Plympton as a leader in regional growth. The expansion was chiefly driven by overseas arrivals, who accounted for roughly of the net population increase over recent times.

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Data compiled by Districts for the suburb of North Plympton reveals a highly educated workforce with strong representation in key service sectors, an unemployment rate of only 1.6%, and an estimated 9.2% growth in employment over the preceding year. As of March 2026, there are 2,422 employed residents. The local unemployment rate sits 2.2% below the Greater Adelaide average of 3.8%, while the labor force participation rate is identical to the regional benchmark of 66.6%. According to Census data, a relatively low share of workers, 10.1%, operated from home, though this figure may be influenced by pandemic-era restriction policies.

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Tax data from the ATO compiled by Districts for the 2023 financial year indicates that income levels in the suburb of North Plympton are below the national average. The median income for local taxpayers is $51,564, while the average income is $61,499. These figures compare to $54,808 (median) and $66,852 (average) across Greater Adelaide. Factoring in Wage Price Index growth of 10.17% since the end of the 2023 financial year, current estimates as of March 2026 would be approximately $56,808 for median income and $67,753 for average income. Census data shows that personal, family, and household incomes all sit at modest levels, positioning the area at the 44th and 44th percentiles. Looking at the income brackets, the largest segment is the $1,500 - 2,999 range, comprising 35.8% of local taxpayers (1,520 people), which matches the regional pattern where this cohort represents . Housing cost pressures are significant, leaving residents with only of their income, which ranks in the th percentile, while the SEIFA index for income places the area in the th decile.

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Census data reveals that the housing stock in the suburb of North Plympton consists of 69.9% houses and 30.0% other dwelling types, such as townhouses and apartments, compared to 75.2% houses and 24.9% other dwellings across the Adelaide metropolitan area. Home ownership rates are slightly below the metropolitan average, standing at 30.4%, with the remaining properties occupied by residents with a mortgage (37.4%) or renting (32.2%). The median monthly mortgage payment of $1,777 is considerably higher than the Adelaide metropolitan average of $1,562, and the median weekly rent of $360 exceeds the regional average of $320. However, compared to national benchmarks, mortgage repayments in the suburb of North Plympton are lower than the Australian median of $1,863, and weekly rents are below the national figure of $375.

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Family households represent the largest share at 60.6% of all dwellings, consisting of couples with children (27.0%), couples without children (22.3%), and single parents (10.0%). Non-family households account for the remaining 39.4%, with single-person households at 33.6% and group households at 5.6%. The median household size is 2.3 people, which is smaller than the Greater Adelaide average of 2.5.

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The local educational profile is distinguished within the region, as 31.6% of residents aged 15 and over hold university degrees, surpassing the South Australian average of 25.7%. Bachelor degrees are the most common higher qualification at 22.0%, with postgraduate degrees held by 7.4% and graduate diplomas by 2.2% of the population. Technical and vocational qualifications are also common, with 28.3% of residents aged 15 and over holding trade credentials, comprising advanced diplomas (10.4%) and certificates (17.9%).

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Public transport infrastructure includes 20 active transit stops located within the suburb of North Plympton, consisting of bus services. These stops are served by 15 separate routes, which support 904 passenger trips each week. Transport accessibility is high, with residents living an average of 178 meters from their nearest stop. Because it is a mostly residential area, most residents travel outside the suburb for work. Private vehicles remain the primary mode of travel at 85%, while 9% of residents commute by bus. Vehicle ownership stands at an average of 1.2 cars per household, which is below the regional average. A relatively low share of 10.1% of residents work from home, based on the 2021 Census, which may reflect conditions during the pandemic.

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Health indicators point to notable challenges in the suburb of North Plympton, as Districts analyses of mortality rates and medical diagnoses show a high prevalence of common health conditions, particularly among the older age groups. Additionally, private health insurance coverage is relatively low, with about 51% of the population (~2,180 people) holding cover.

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Cultural diversity in the suburb of North Plympton is higher than in most other local areas, with 33.1% of residents born outside Australia and 29.8% speaking a language other than English at home. Christianity is the main religion, practiced by 45.8% of the community. There is also a notable concentration of residents identifying as Other, who make up 3.1% of the population compared to 1.8% across Greater Adelaide.

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The median age in the suburb of North Plympton is 39 years, matching the Greater Adelaide average of 39 and closely aligning with the national median of 38. Compared to Greater Adelaide, the population aged 85 and over is highly represented at 8.0% locally (well above the national share of 2.2%), while children aged 5 to 14 years are underrepresented at 8.1%. Since the 2021 Census, the 25 to 34 age bracket has increased from 16.3% to 18.8% of the population, and the 35 to 44 bracket rose from 13.2% to 14.3%, while the cohort aged 85 and over decreased from 9.4% to 8.0%. Demographic models indicate that the age profile will shift by with the group aged and over projected to grow by , adding residents to reach a total of .

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North Plympton currently has an estimated 229 children under 5 years old, comprising approximately 130 children aged 0-2 and 87 children aged 3-4. This cohort grew by an estimated 16% since the previous census. while population forecasts indicate future growth, with an anticipated increase of 15% by 2041 (to approximately 263 children). Meanwhile the 5-12 cohort currently amounts to 307. While growth has been positive birth rates observed in the area have been moderate, with approximately 10.1 births per 1,000 residents recorded over the latest two-year period analysed which ranks the area within the middle tier nationally. This rate has slowed down slightly in recent years however.