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, Older workers and pre-retirees (50 to 59) was the most common category among residents in Chapel Hill (SA), accounting for 20.5% (26 people). This share was higher than Mount Barker (DC) (13%). Since 2016, the biggest change was in Empty nesters and retirees (60 to 69), which increased by 11 people and 7.1 percentage points.
Section overview
Age structure - Service age groups
Chapel Hill (SA) - Total persons (Usual residence)
This table summarises service age groups for Chapel Hill (SA) in 2021 for persons, with comparison against Mount Barker (DC) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Chapel Hill (SA), with comparison markers for Mount Barker (DC).
Babies and pre-schoolers (0 to 4)
2021 count
3
% of total
2.4%
Change from 2016
+2.4pp
3
2.4%
+2.4pp
Primary schoolers (5 to 11)
2021 count
4
% of total
3.1%
Change from 2016
+0.3pp
4
3.1%
+0.3pp
Secondary schoolers (12 to 17)
2021 count
15
% of total
11.8%
Change from 2016
+2.6pp
15
11.8%
+2.6pp
Tertiary education and independence (18 to 24)
2021 count
13
% of total
10.2%
Change from 2016
-2.6pp
13
10.2%
-2.6pp
Young workforce (25 to 34)
2021 count
7
% of total
5.5%
Change from 2016
-6.4pp
7
5.5%
-6.4pp
Parents and homebuilders (35 to 49)
2021 count
13
% of total
10.2%
Change from 2016
+1.9pp
13
10.2%
+1.9pp
Older workers and pre-retirees (50 to 59)
2021 count
26
% of total
20.5%
Change from 2016
+5.8pp
26
20.5%
+5.8pp
Empty nesters and retirees (60 to 69)
2021 count
23
% of total
18.1%
Change from 2016
+7.1pp
23
18.1%
+7.1pp
Seniors (70 to 84)
2021 count
18
% of total
14.2%
Change from 2016
+3.2pp
18
14.2%
+3.2pp
Elderly aged (85 and over)
2021 count
0
% of total
0.0%
Change from 2016
0.0pp
0
0.0%
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)
+3
+2.4pp
Primary schoolers (5 to 11)
+1
+0.3pp
Secondary schoolers (12 to 17)
+5
+2.6pp
Tertiary education and independence (18 to 24)
-1
-2.6pp
Young workforce (25 to 34)
-6
-6.4pp
Parents and homebuilders (35 to 49)
+4
+1.9pp
Older workers and pre-retirees (50 to 59)
+10
+5.8pp
Empty nesters and retirees (60 to 69)
+11
+7.1pp
Seniors (70 to 84)
+6
+3.2pp
Elderly aged (85 and over)
0
0.0pp
Data table
Service age groups for Chapel Hill (SA). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Mount Barker (DC).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mount Barker (DC)% | Count | % | Mount Barker (DC)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 3 | 2.4% | 6.4% | 0 | 0.0% | 6.4% | +3 | +2.4pp |
| Primary schoolers (5 to 11) | 4 | 3.1% | 9.1% | 3 | 2.8% | 9.7% | +1 | +0.3pp |
| Secondary schoolers (12 to 17) | 15 | 11.8% | 7.8% | 10 | 9.2% | 8.2% | +5 | +2.6pp |
| Tertiary education and independence (18 to 24) | 13 | 10.2% | 8.1% | 14 | 12.8% | 8.4% | -1 | -2.6pp |
| Young workforce (25 to 34) | 7 | 5.5% | 12.6% | 13 | 11.9% | 11.5% | -6 | -6.4pp |
| Parents and homebuilders (35 to 49) | 13 | 10.2% | 19.6% | 9 | 8.3% | 20.7% | +4 | +1.9pp |
| Older workers and pre-retirees (50 to 59) | 26 | 20.5% | 13.0% | 16 | 14.7% | 13.6% | +10 | +5.8pp |
| Empty nesters and retirees (60 to 69) | 23 | 18.1% | 11.5% | 12 | 11.0% | 11.5% | +11 | +7.1pp |
| Seniors (70 to 84) | 18 | 14.2% | 10.2% | 12 | 11.0% | 8.1% | +6 | +3.2pp |
| Elderly aged (85 and over) | 0 | 0.0% | 1.9% | 0 | 0.0% | 1.9% | 0 | 0.0pp |
| Total | 127 | 100.0% | 100.0% | 109 | 100.0% | 100.0% | +18 | 0.0pp |