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 Oak Park, accounting for 24.2% (1,623 people). This share was higher than Moreland (C) (23%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 1,602 people and 2.6 percentage points.
Section overview
Age structure - Service age groups
Oak Park - Total persons (Usual residence)
This table summarises service age groups for Oak Park in 2021 for persons, with comparison against Moreland (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Oak Park, with comparison markers for Moreland (C).
Babies and pre-schoolers (0 to 4)
2021 count
435
% of total
6.5%
Change from 2016
+6.5pp
435
6.5%
+6.5pp
Primary schoolers (5 to 11)
2021 count
514
% of total
7.7%
Change from 2016
+0.5pp
514
7.7%
+0.5pp
Secondary schoolers (12 to 17)
2021 count
333
% of total
5.0%
Change from 2016
-9.4pp
333
5.0%
-9.4pp
Tertiary education and independence (18 to 24)
2021 count
612
% of total
9.1%
Change from 2016
+6.0pp
612
9.1%
+6.0pp
Young workforce (25 to 34)
2021 count
1,262
% of total
18.8%
Change from 2016
+18.8pp
1,262
18.8%
+18.8pp
Parents and homebuilders (35 to 49)
2021 count
1,623
% of total
24.2%
Change from 2016
+2.6pp
1,623
24.2%
+2.6pp
Older workers and pre-retirees (50 to 59)
2021 count
759
% of total
11.3%
Change from 2016
+8.2pp
759
11.3%
+8.2pp
Empty nesters and retirees (60 to 69)
2021 count
582
% of total
8.7%
Change from 2016
-1.6pp
582
8.7%
-1.6pp
Seniors (70 to 84)
2021 count
432
% of total
6.4%
Change from 2016
+6.4pp
432
6.4%
+6.4pp
Elderly aged (85 and over)
2021 count
146
% of total
2.2%
Change from 2016
+2.2pp
146
2.2%
+2.2pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+435
+6.5pp
Primary schoolers (5 to 11)
+507
+0.5pp
Secondary schoolers (12 to 17)
+319
-9.4pp
Tertiary education and independence (18 to 24)
+609
+6.0pp
Young workforce (25 to 34)
+1,262
+18.8pp
Parents and homebuilders (35 to 49)
+1,602
+2.6pp
Older workers and pre-retirees (50 to 59)
+756
+8.2pp
Empty nesters and retirees (60 to 69)
+572
-1.6pp
Seniors (70 to 84)
+432
+6.4pp
Elderly aged (85 and over)
+146
+2.2pp
Data table
Service age groups for Oak Park. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Moreland (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Moreland (C)% | Count | % | Moreland (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 435 | 6.5% | 5.7% | 0 | 0.0% | 6.3% | +435 | +6.5pp |
| Primary schoolers (5 to 11) | 514 | 7.7% | 7.1% | 7 | 7.2% | 7.2% | +507 | +0.5pp |
| Secondary schoolers (12 to 17) | 333 | 5.0% | 5.1% | 14 | 14.4% | 4.9% | +319 | -9.4pp |
| Tertiary education and independence (18 to 24) | 612 | 9.1% | 9.0% | 3 | 3.1% | 9.9% | +609 | +6.0pp |
| Young workforce (25 to 34) | 1,262 | 18.8% | 21.7% | 0 | 0.0% | 21.8% | +1,262 | +18.8pp |
| Parents and homebuilders (35 to 49) | 1,623 | 24.2% | 23.0% | 21 | 21.6% | 22.1% | +1,602 | +2.6pp |
| Older workers and pre-retirees (50 to 59) | 759 | 11.3% | 10.8% | 3 | 3.1% | 10.2% | +756 | +8.2pp |
| Empty nesters and retirees (60 to 69) | 582 | 8.7% | 7.6% | 10 | 10.3% | 7.1% | +572 | -1.6pp |
| Seniors (70 to 84) | 432 | 6.4% | 7.3% | 0 | 0.0% | 7.8% | +432 | +6.4pp |
| Elderly aged (85 and over) | 146 | 2.2% | 2.7% | 0 | 0.0% | 2.7% | +146 | +2.2pp |
| Total | 6,714 | 100.0% | 100.0% | 97 | 100.0% | 100.0% | +6,617 | 0.0pp |