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 Clarendon (SA), accounting for 16.5% (106 people). This share was lower than Onkaparinga (C) (19.2%). Since 2016, the biggest change was in Older workers and pre-retirees (50 to 59), which decreased by 26 people and 4.8 percentage points.
Section overview
Age structure - Service age groups
Clarendon (SA) - Total persons (Usual residence)
This table summarises service age groups for Clarendon (SA) in 2021 for persons, with comparison against Onkaparinga (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Clarendon (SA), with comparison markers for Onkaparinga (C).
Babies and pre-schoolers (0 to 4)
2021 count
21
% of total
3.3%
Change from 2016
-1.4pp
21
3.3%
-1.4pp
Primary schoolers (5 to 11)
2021 count
47
% of total
7.3%
Change from 2016
-1.0pp
47
7.3%
-1.0pp
Secondary schoolers (12 to 17)
2021 count
60
% of total
9.3%
Change from 2016
+0.9pp
60
9.3%
+0.9pp
Tertiary education and independence (18 to 24)
2021 count
53
% of total
8.2%
Change from 2016
+1.6pp
53
8.2%
+1.6pp
Young workforce (25 to 34)
2021 count
35
% of total
5.4%
Change from 2016
-0.6pp
35
5.4%
-0.6pp
Parents and homebuilders (35 to 49)
2021 count
106
% of total
16.5%
Change from 2016
-3.2pp
106
16.5%
-3.2pp
Older workers and pre-retirees (50 to 59)
2021 count
99
% of total
15.4%
Change from 2016
-4.8pp
99
15.4%
-4.8pp
Empty nesters and retirees (60 to 69)
2021 count
97
% of total
15.1%
Change from 2016
-1.6pp
97
15.1%
-1.6pp
Seniors (70 to 84)
2021 count
79
% of total
12.3%
Change from 2016
+1.5pp
79
12.3%
+1.5pp
Elderly aged (85 and over)
2021 count
3
% of total
0.5%
Change from 2016
0.0pp
3
0.5%
0.0pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-8
-1.4pp
Primary schoolers (5 to 11)
-4
-1.0pp
Secondary schoolers (12 to 17)
+8
+0.9pp
Tertiary education and independence (18 to 24)
+12
+1.6pp
Young workforce (25 to 34)
-2
-0.6pp
Parents and homebuilders (35 to 49)
-16
-3.2pp
Older workers and pre-retirees (50 to 59)
-26
-4.8pp
Empty nesters and retirees (60 to 69)
-6
-1.6pp
Seniors (70 to 84)
+12
+1.5pp
Elderly aged (85 and over)
0
0.0pp
Data table
Service age groups for Clarendon (SA). 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) | 21 | 3.3% | 5.4% | 29 | 4.7% | 6.2% | -8 | -1.4pp |
| Primary schoolers (5 to 11) | 47 | 7.3% | 8.6% | 51 | 8.3% | 8.9% | -4 | -1.0pp |
| Secondary schoolers (12 to 17) | 60 | 9.3% | 7.3% | 52 | 8.4% | 7.5% | +8 | +0.9pp |
| Tertiary education and independence (18 to 24) | 53 | 8.2% | 7.9% | 41 | 6.6% | 8.4% | +12 | +1.6pp |
| Young workforce (25 to 34) | 35 | 5.4% | 12.2% | 37 | 6.0% | 12.4% | -2 | -0.6pp |
| Parents and homebuilders (35 to 49) | 106 | 16.5% | 19.2% | 122 | 19.7% | 19.7% | -16 | -3.2pp |
| Older workers and pre-retirees (50 to 59) | 99 | 15.4% | 13.1% | 125 | 20.2% | 13.3% | -26 | -4.8pp |
| Empty nesters and retirees (60 to 69) | 97 | 15.1% | 12.3% | 103 | 16.7% | 12.4% | -6 | -1.6pp |
| Seniors (70 to 84) | 79 | 12.3% | 11.8% | 67 | 10.8% | 9.1% | +12 | +1.5pp |
| Elderly aged (85 and over) | 3 | 0.5% | 2.2% | 3 | 0.5% | 2.1% | 0 | 0.0pp |
| Total | 643 | 100.0% | 100.0% | 618 | 100.0% | 100.0% | +25 | 0.0pp |