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, Young workforce (25 to 34) was the most common category among residents in Donnybrook (Vic.), accounting for 31.6% (664 people). This share was higher than Whittlesea (C) (15.6%). Since 2016, the biggest change was in Young workforce (25 to 34), which increased by 645 people and 20.4 percentage points.
Section overview
Age structure - Service age groups
Donnybrook (Vic.) - Total persons (Usual residence)
This table summarises service age groups for Donnybrook (Vic.) in 2021 for persons, with comparison against Whittlesea (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Donnybrook (Vic.), with comparison markers for Whittlesea (C).
Babies and pre-schoolers (0 to 4)
2021 count
247
% of total
11.8%
Change from 2016
+11.8pp
247
11.8%
+11.8pp
Primary schoolers (5 to 11)
2021 count
233
% of total
11.1%
Change from 2016
+8.1pp
233
11.1%
+8.1pp
Secondary schoolers (12 to 17)
2021 count
88
% of total
4.2%
Change from 2016
-3.5pp
88
4.2%
-3.5pp
Tertiary education and independence (18 to 24)
2021 count
167
% of total
8.0%
Change from 2016
+0.9pp
167
8.0%
+0.9pp
Young workforce (25 to 34)
2021 count
664
% of total
31.6%
Change from 2016
+20.4pp
664
31.6%
+20.4pp
Parents and homebuilders (35 to 49)
2021 count
477
% of total
22.7%
Change from 2016
+6.7pp
477
22.7%
+6.7pp
Older workers and pre-retirees (50 to 59)
2021 count
118
% of total
5.6%
Change from 2016
-9.2pp
118
5.6%
-9.2pp
Empty nesters and retirees (60 to 69)
2021 count
79
% of total
3.8%
Change from 2016
-8.6pp
79
3.8%
-8.6pp
Seniors (70 to 84)
2021 count
22
% of total
1.0%
Change from 2016
-13.8pp
22
1.0%
-13.8pp
Elderly aged (85 and over)
2021 count
6
% of total
0.3%
Change from 2016
-1.5pp
6
0.3%
-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)
+247
+11.8pp
Primary schoolers (5 to 11)
+228
+8.1pp
Secondary schoolers (12 to 17)
+75
-3.5pp
Tertiary education and independence (18 to 24)
+155
+0.9pp
Young workforce (25 to 34)
+645
+20.4pp
Parents and homebuilders (35 to 49)
+450
+6.7pp
Older workers and pre-retirees (50 to 59)
+93
-9.2pp
Empty nesters and retirees (60 to 69)
+58
-8.6pp
Seniors (70 to 84)
-3
-13.8pp
Elderly aged (85 and over)
+3
-1.5pp
Data table
Service age groups for Donnybrook (Vic.). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Whittlesea (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Whittlesea (C)% | Count | % | Whittlesea (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 247 | 11.8% | 7.2% | 0 | 0.0% | 8.2% | +247 | +11.8pp |
| Primary schoolers (5 to 11) | 233 | 11.1% | 10.2% | 5 | 3.0% | 9.6% | +228 | +8.1pp |
| Secondary schoolers (12 to 17) | 88 | 4.2% | 7.3% | 13 | 7.7% | 7.0% | +75 | -3.5pp |
| Tertiary education and independence (18 to 24) | 167 | 8.0% | 8.5% | 12 | 7.1% | 9.3% | +155 | +0.9pp |
| Young workforce (25 to 34) | 664 | 31.6% | 15.6% | 19 | 11.2% | 17.1% | +645 | +20.4pp |
| Parents and homebuilders (35 to 49) | 477 | 22.7% | 22.6% | 27 | 16.0% | 21.4% | +450 | +6.7pp |
| Older workers and pre-retirees (50 to 59) | 118 | 5.6% | 11.0% | 25 | 14.8% | 11.1% | +93 | -9.2pp |
| Empty nesters and retirees (60 to 69) | 79 | 3.8% | 8.7% | 21 | 12.4% | 8.6% | +58 | -8.6pp |
| Seniors (70 to 84) | 22 | 1.0% | 7.4% | 25 | 14.8% | 6.5% | -3 | -13.8pp |
| Elderly aged (85 and over) | 6 | 0.3% | 1.5% | 3 | 1.8% | 1.2% | +3 | -1.5pp |
| Total | 2,100 | 100.0% | 100.0% | 169 | 100.0% | 100.0% | +1,931 | 0.0pp |