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 Ardeer, accounting for 24.4% (773 people). This share was higher than Brimbank (C) (19.9%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 690 people and 7.4 percentage points.
Section overview
Age structure - Service age groups
Ardeer - Total persons (Usual residence)
This table summarises service age groups for Ardeer in 2021 for persons, with comparison against Brimbank (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Ardeer, with comparison markers for Brimbank (C).
Babies and pre-schoolers (0 to 4)
2021 count
226
% of total
7.1%
Change from 2016
+3.2pp
226
7.1%
+3.2pp
Primary schoolers (5 to 11)
2021 count
246
% of total
7.8%
Change from 2016
-0.2pp
246
7.8%
-0.2pp
Secondary schoolers (12 to 17)
2021 count
147
% of total
4.6%
Change from 2016
-4.2pp
147
4.6%
-4.2pp
Tertiary education and independence (18 to 24)
2021 count
216
% of total
6.8%
Change from 2016
+1.1pp
216
6.8%
+1.1pp
Young workforce (25 to 34)
2021 count
604
% of total
19.1%
Change from 2016
+4.5pp
604
19.1%
+4.5pp
Parents and homebuilders (35 to 49)
2021 count
773
% of total
24.4%
Change from 2016
+7.4pp
773
24.4%
+7.4pp
Older workers and pre-retirees (50 to 59)
2021 count
320
% of total
10.1%
Change from 2016
-11.5pp
320
10.1%
-11.5pp
Empty nesters and retirees (60 to 69)
2021 count
267
% of total
8.4%
Change from 2016
-2.5pp
267
8.4%
-2.5pp
Seniors (70 to 84)
2021 count
278
% of total
8.8%
Change from 2016
+2.6pp
278
8.8%
+2.6pp
Elderly aged (85 and over)
2021 count
114
% of total
3.6%
Change from 2016
+3.0pp
114
3.6%
+3.0pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+207
+3.2pp
Primary schoolers (5 to 11)
+207
-0.2pp
Secondary schoolers (12 to 17)
+104
-4.2pp
Tertiary education and independence (18 to 24)
+188
+1.1pp
Young workforce (25 to 34)
+533
+4.5pp
Parents and homebuilders (35 to 49)
+690
+7.4pp
Older workers and pre-retirees (50 to 59)
+215
-11.5pp
Empty nesters and retirees (60 to 69)
+214
-2.5pp
Seniors (70 to 84)
+248
+2.6pp
Elderly aged (85 and over)
+111
+3.0pp
Data table
Service age groups for Ardeer. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Brimbank (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Brimbank (C)% | Count | % | Brimbank (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 226 | 7.1% | 5.6% | 19 | 3.9% | 6.7% | +207 | +3.2pp |
| Primary schoolers (5 to 11) | 246 | 7.8% | 8.3% | 39 | 8.0% | 8.3% | +207 | -0.2pp |
| Secondary schoolers (12 to 17) | 147 | 4.6% | 6.8% | 43 | 8.8% | 7.1% | +104 | -4.2pp |
| Tertiary education and independence (18 to 24) | 216 | 6.8% | 9.2% | 28 | 5.7% | 10.4% | +188 | +1.1pp |
| Young workforce (25 to 34) | 604 | 19.1% | 15.7% | 71 | 14.6% | 16.1% | +533 | +4.5pp |
| Parents and homebuilders (35 to 49) | 773 | 24.4% | 19.9% | 83 | 17.0% | 20.1% | +690 | +7.4pp |
| Older workers and pre-retirees (50 to 59) | 320 | 10.1% | 12.4% | 105 | 21.6% | 12.3% | +215 | -11.5pp |
| Empty nesters and retirees (60 to 69) | 267 | 8.4% | 10.9% | 53 | 10.9% | 10.1% | +214 | -2.5pp |
| Seniors (70 to 84) | 278 | 8.8% | 9.3% | 30 | 6.2% | 7.3% | +248 | +2.6pp |
| Elderly aged (85 and over) | 114 | 3.6% | 1.9% | 3 | 0.6% | 1.5% | +111 | +3.0pp |
| Total | 3,170 | 100.0% | 100.0% | 487 | 100.0% | 100.0% | +2,683 | 0.0pp |