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 Coromandel Valley (part), accounting for 22.3% (975 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 948 people and 8.5 percentage points.
Section overview
Age structure - Service age groups
Coromandel Valley (part) - Total persons (Usual residence)
This table summarises service age groups for Coromandel Valley (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 Coromandel Valley (part), with comparison markers for Onkaparinga (C).
Babies and pre-schoolers (0 to 4)
2021 count
244
% of total
5.6%
Change from 2016
-3.1pp
244
5.6%
-3.1pp
Primary schoolers (5 to 11)
2021 count
478
% of total
10.9%
Change from 2016
+0.6pp
478
10.9%
+0.6pp
Secondary schoolers (12 to 17)
2021 count
378
% of total
8.6%
Change from 2016
-5.2pp
378
8.6%
-5.2pp
Tertiary education and independence (18 to 24)
2021 count
335
% of total
7.6%
Change from 2016
+3.0pp
335
7.6%
+3.0pp
Young workforce (25 to 34)
2021 count
399
% of total
9.1%
Change from 2016
-2.2pp
399
9.1%
-2.2pp
Parents and homebuilders (35 to 49)
2021 count
975
% of total
22.3%
Change from 2016
+8.5pp
975
22.3%
+8.5pp
Older workers and pre-retirees (50 to 59)
2021 count
586
% of total
13.4%
Change from 2016
-6.1pp
586
13.4%
-6.1pp
Empty nesters and retirees (60 to 69)
2021 count
516
% of total
11.8%
Change from 2016
+1.0pp
516
11.8%
+1.0pp
Seniors (70 to 84)
2021 count
451
% of total
10.3%
Change from 2016
+8.8pp
451
10.3%
+8.8pp
Elderly aged (85 and over)
2021 count
30
% of total
0.7%
Change from 2016
+0.7pp
30
0.7%
+0.7pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+227
-3.1pp
Primary schoolers (5 to 11)
+458
+0.6pp
Secondary schoolers (12 to 17)
+351
-5.2pp
Tertiary education and independence (18 to 24)
+326
+3.0pp
Young workforce (25 to 34)
+377
-2.2pp
Parents and homebuilders (35 to 49)
+948
+8.5pp
Older workers and pre-retirees (50 to 59)
+548
-6.1pp
Empty nesters and retirees (60 to 69)
+495
+1.0pp
Seniors (70 to 84)
+448
+8.8pp
Elderly aged (85 and over)
+30
+0.7pp
Data table
Service age groups for Coromandel Valley (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) | 244 | 5.6% | 5.4% | 17 | 8.7% | 6.2% | +227 | -3.1pp |
| Primary schoolers (5 to 11) | 478 | 10.9% | 8.6% | 20 | 10.3% | 8.9% | +458 | +0.6pp |
| Secondary schoolers (12 to 17) | 378 | 8.6% | 7.3% | 27 | 13.8% | 7.5% | +351 | -5.2pp |
| Tertiary education and independence (18 to 24) | 335 | 7.6% | 7.9% | 9 | 4.6% | 8.4% | +326 | +3.0pp |
| Young workforce (25 to 34) | 399 | 9.1% | 12.2% | 22 | 11.3% | 12.4% | +377 | -2.2pp |
| Parents and homebuilders (35 to 49) | 975 | 22.3% | 19.2% | 27 | 13.8% | 19.7% | +948 | +8.5pp |
| Older workers and pre-retirees (50 to 59) | 586 | 13.4% | 13.1% | 38 | 19.5% | 13.3% | +548 | -6.1pp |
| Empty nesters and retirees (60 to 69) | 516 | 11.8% | 12.3% | 21 | 10.8% | 12.4% | +495 | +1.0pp |
| Seniors (70 to 84) | 451 | 10.3% | 11.8% | 3 | 1.5% | 9.1% | +448 | +8.8pp |
| Elderly aged (85 and over) | 30 | 0.7% | 2.2% | 0 | 0.0% | 2.1% | +30 | +0.7pp |
| Total | 4,380 | 100.0% | 100.0% | 195 | 100.0% | 100.0% | +4,185 | 0.0pp |