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 Belair (part), accounting for 18.9% (892 people). This share was lower than Mitcham (C) (19.9%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 220 people and 3.9 percentage points.
Section overview
Age structure - Service age groups
Belair (part) - Total persons (Usual residence)
This table summarises service age groups for Belair (part) in 2021 for persons, with comparison against Mitcham (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Belair (part), with comparison markers for Mitcham (C).
Babies and pre-schoolers (0 to 4)
2021 count
218
% of total
4.6%
Change from 2016
+0.2pp
218
4.6%
+0.2pp
Primary schoolers (5 to 11)
2021 count
387
% of total
8.2%
Change from 2016
+1.1pp
387
8.2%
+1.1pp
Secondary schoolers (12 to 17)
2021 count
361
% of total
7.7%
Change from 2016
-0.7pp
361
7.7%
-0.7pp
Tertiary education and independence (18 to 24)
2021 count
386
% of total
8.2%
Change from 2016
-0.2pp
386
8.2%
-0.2pp
Young workforce (25 to 34)
2021 count
308
% of total
6.5%
Change from 2016
-0.6pp
308
6.5%
-0.6pp
Parents and homebuilders (35 to 49)
2021 count
892
% of total
18.9%
Change from 2016
-0.7pp
892
18.9%
-0.7pp
Older workers and pre-retirees (50 to 59)
2021 count
676
% of total
14.3%
Change from 2016
0.0pp
676
14.3%
0.0pp
Empty nesters and retirees (60 to 69)
2021 count
558
% of total
11.8%
Change from 2016
-2.0pp
558
11.8%
-2.0pp
Seniors (70 to 84)
2021 count
736
% of total
15.6%
Change from 2016
+3.9pp
736
15.6%
+3.9pp
Elderly aged (85 and over)
2021 count
196
% of total
4.2%
Change from 2016
-0.3pp
196
4.2%
-0.3pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+22
+0.2pp
Primary schoolers (5 to 11)
+76
+1.1pp
Secondary schoolers (12 to 17)
-9
-0.7pp
Tertiary education and independence (18 to 24)
+17
-0.2pp
Young workforce (25 to 34)
-7
-0.6pp
Parents and homebuilders (35 to 49)
+26
-0.7pp
Older workers and pre-retirees (50 to 59)
+45
0.0pp
Empty nesters and retirees (60 to 69)
-49
-2.0pp
Seniors (70 to 84)
+220
+3.9pp
Elderly aged (85 and over)
-1
-0.3pp
Data table
Service age groups for Belair (part). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Mitcham (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mitcham (C)% | Count | % | Mitcham (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 218 | 4.6% | 4.9% | 196 | 4.4% | 5.3% | +22 | +0.2pp |
| Primary schoolers (5 to 11) | 387 | 8.2% | 8.4% | 311 | 7.1% | 8.6% | +76 | +1.1pp |
| Secondary schoolers (12 to 17) | 361 | 7.7% | 7.7% | 370 | 8.4% | 7.5% | -9 | -0.7pp |
| Tertiary education and independence (18 to 24) | 386 | 8.2% | 8.6% | 369 | 8.4% | 9.1% | +17 | -0.2pp |
| Young workforce (25 to 34) | 308 | 6.5% | 10.5% | 315 | 7.1% | 10.7% | -7 | -0.6pp |
| Parents and homebuilders (35 to 49) | 892 | 18.9% | 19.9% | 866 | 19.6% | 20.0% | +26 | -0.7pp |
| Older workers and pre-retirees (50 to 59) | 676 | 14.3% | 12.9% | 631 | 14.3% | 13.4% | +45 | 0.0pp |
| Empty nesters and retirees (60 to 69) | 558 | 11.8% | 11.5% | 607 | 13.8% | 11.5% | -49 | -2.0pp |
| Seniors (70 to 84) | 736 | 15.6% | 12.2% | 516 | 11.7% | 10.4% | +220 | +3.9pp |
| Elderly aged (85 and over) | 196 | 4.2% | 3.3% | 197 | 4.5% | 3.4% | -1 | -0.3pp |
| Total | 4,718 | 100.0% | 100.0% | 4,411 | 100.0% | 100.0% | +307 | 0.0pp |