Population
Service age groups
About this topic
Service age groups divide the population into broad life-stage bands such as children, young adults, working-age adults, and older people. The groupings are designed to reflect typical demand for age-based services and facilities rather than exact five-year cohorts.
This view is useful for planning childcare, schools, recreation, aged services, and other community infrastructure. It works best alongside five year age groups, household type, and dwelling data, which add more detail about who is living in an area and how needs may change over time.
Interpretation notes
- This is a derived grouping rather than a direct Census question, so the age bands are planning-oriented summaries built from standard age data.
- Percentages relate to the total population; use five year age groups when exact cohort detail matters.
Related topics
Key insight
In 2021, Parents and homebuilders (35 to 49) was the most common category among residents in Reynella (part), accounting for 20.8% (1,007 people). This share was higher than Onkaparinga (C) (19.2%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 1,007 people and 20.8 percentage points.
Section overview
Age structure - Service age groups
Reynella (part) - Total persons (Usual residence)
This table summarises service age groups for Reynella (part) in 2021 for persons, with comparison against Onkaparinga (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Reynella (part), with comparison markers for Onkaparinga (C).
Babies and pre-schoolers (0 to 4)
2021 count
298
% of total
6.2%
Change from 2016
+6.2pp
298
6.2%
+6.2pp
Primary schoolers (5 to 11)
2021 count
411
% of total
8.5%
Change from 2016
+8.5pp
411
8.5%
+8.5pp
Secondary schoolers (12 to 17)
2021 count
321
% of total
6.6%
Change from 2016
+6.6pp
321
6.6%
+6.6pp
Tertiary education and independence (18 to 24)
2021 count
377
% of total
7.8%
Change from 2016
+7.8pp
377
7.8%
+7.8pp
Young workforce (25 to 34)
2021 count
751
% of total
15.5%
Change from 2016
+15.5pp
751
15.5%
+15.5pp
Parents and homebuilders (35 to 49)
2021 count
1,007
% of total
20.8%
Change from 2016
+20.8pp
1,007
20.8%
+20.8pp
Older workers and pre-retirees (50 to 59)
2021 count
533
% of total
11.0%
Change from 2016
+11.0pp
533
11.0%
+11.0pp
Empty nesters and retirees (60 to 69)
2021 count
506
% of total
10.5%
Change from 2016
+10.5pp
506
10.5%
+10.5pp
Seniors (70 to 84)
2021 count
563
% of total
11.6%
Change from 2016
+11.6pp
563
11.6%
+11.6pp
Elderly aged (85 and over)
2021 count
72
% of total
1.5%
Change from 2016
+1.5pp
72
1.5%
+1.5pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+298
+6.2pp
Primary schoolers (5 to 11)
+411
+8.5pp
Secondary schoolers (12 to 17)
+321
+6.6pp
Tertiary education and independence (18 to 24)
+377
+7.8pp
Young workforce (25 to 34)
+751
+15.5pp
Parents and homebuilders (35 to 49)
+1,007
+20.8pp
Older workers and pre-retirees (50 to 59)
+533
+11.0pp
Empty nesters and retirees (60 to 69)
+506
+10.5pp
Seniors (70 to 84)
+563
+11.6pp
Elderly aged (85 and over)
+72
+1.5pp
Data table
Service age groups for Reynella (part). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Onkaparinga (C)% | Count | % | Onkaparinga (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 298 | 6.2% | 5.4% | 0 | 0.0% | 6.2% | +298 | +6.2pp |
| Primary schoolers (5 to 11) | 411 | 8.5% | 8.6% | 0 | 0.0% | 8.9% | +411 | +8.5pp |
| Secondary schoolers (12 to 17) | 321 | 6.6% | 7.3% | 0 | 0.0% | 7.5% | +321 | +6.6pp |
| Tertiary education and independence (18 to 24) | 377 | 7.8% | 7.9% | 0 | 0.0% | 8.4% | +377 | +7.8pp |
| Young workforce (25 to 34) | 751 | 15.5% | 12.2% | 0 | 0.0% | 12.4% | +751 | +15.5pp |
| Parents and homebuilders (35 to 49) | 1,007 | 20.8% | 19.2% | 0 | 0.0% | 19.7% | +1,007 | +20.8pp |
| Older workers and pre-retirees (50 to 59) | 533 | 11.0% | 13.1% | 0 | 0.0% | 13.3% | +533 | +11.0pp |
| Empty nesters and retirees (60 to 69) | 506 | 10.5% | 12.3% | 0 | 0.0% | 12.4% | +506 | +10.5pp |
| Seniors (70 to 84) | 563 | 11.6% | 11.8% | 0 | 0.0% | 9.1% | +563 | +11.6pp |
| Elderly aged (85 and over) | 72 | 1.5% | 2.2% | 0 | 0.0% | 2.1% | +72 | +1.5pp |
| Total | 4,836 | 100.0% | 100.0% | 13 | 100.0% | 100.0% | +4,823 | 0.0pp |