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 Oaklands Park, accounting for 18.8% (742 people). This share was higher than Marion (C) (15.1%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 96 people and 2 percentage points.
Section overview
Age structure - Service age groups
Oaklands Park - Total persons (Usual residence)
This table summarises service age groups for Oaklands Park in 2021 for persons, with comparison against Marion (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Oaklands Park, with comparison markers for Marion (C).
Babies and pre-schoolers (0 to 4)
2021 count
178
% of total
4.5%
Change from 2016
-1.0pp
178
4.5%
-1.0pp
Primary schoolers (5 to 11)
2021 count
201
% of total
5.1%
Change from 2016
+0.3pp
201
5.1%
+0.3pp
Secondary schoolers (12 to 17)
2021 count
168
% of total
4.3%
Change from 2016
-0.1pp
168
4.3%
-0.1pp
Tertiary education and independence (18 to 24)
2021 count
413
% of total
10.5%
Change from 2016
-2.4pp
413
10.5%
-2.4pp
Young workforce (25 to 34)
2021 count
742
% of total
18.8%
Change from 2016
+1.4pp
742
18.8%
+1.4pp
Parents and homebuilders (35 to 49)
2021 count
726
% of total
18.4%
Change from 2016
+2.0pp
726
18.4%
+2.0pp
Older workers and pre-retirees (50 to 59)
2021 count
398
% of total
10.1%
Change from 2016
-0.3pp
398
10.1%
-0.3pp
Empty nesters and retirees (60 to 69)
2021 count
399
% of total
10.1%
Change from 2016
-0.7pp
399
10.1%
-0.7pp
Seniors (70 to 84)
2021 count
454
% of total
11.5%
Change from 2016
+1.0pp
454
11.5%
+1.0pp
Elderly aged (85 and over)
2021 count
271
% of total
6.9%
Change from 2016
-1.0pp
271
6.9%
-1.0pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-33
-1.0pp
Primary schoolers (5 to 11)
+16
+0.3pp
Secondary schoolers (12 to 17)
0
-0.1pp
Tertiary education and independence (18 to 24)
-82
-2.4pp
Young workforce (25 to 34)
+74
+1.4pp
Parents and homebuilders (35 to 49)
+96
+2.0pp
Older workers and pre-retirees (50 to 59)
-1
-0.3pp
Empty nesters and retirees (60 to 69)
-15
-0.7pp
Seniors (70 to 84)
+50
+1.0pp
Elderly aged (85 and over)
-34
-1.0pp
Data table
Service age groups for Oaklands Park. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Marion (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Marion (C)% | Count | % | Marion (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 178 | 4.5% | 5.4% | 211 | 5.5% | 5.9% | -33 | -1.0pp |
| Primary schoolers (5 to 11) | 201 | 5.1% | 7.7% | 185 | 4.8% | 7.4% | +16 | +0.3pp |
| Secondary schoolers (12 to 17) | 168 | 4.3% | 6.1% | 168 | 4.4% | 6.1% | 0 | -0.1pp |
| Tertiary education and independence (18 to 24) | 413 | 10.5% | 8.8% | 495 | 12.9% | 9.6% | -82 | -2.4pp |
| Young workforce (25 to 34) | 742 | 18.8% | 15.1% | 668 | 17.4% | 14.8% | +74 | +1.4pp |
| Parents and homebuilders (35 to 49) | 726 | 18.4% | 20.2% | 630 | 16.4% | 19.5% | +96 | +2.0pp |
| Older workers and pre-retirees (50 to 59) | 398 | 10.1% | 11.7% | 399 | 10.4% | 13.0% | -1 | -0.3pp |
| Empty nesters and retirees (60 to 69) | 399 | 10.1% | 11.8% | 414 | 10.8% | 11.4% | -15 | -0.7pp |
| Seniors (70 to 84) | 454 | 11.5% | 10.4% | 404 | 10.5% | 9.1% | +50 | +1.0pp |
| Elderly aged (85 and over) | 271 | 6.9% | 2.9% | 305 | 7.9% | 3.1% | -34 | -1.0pp |
| Total | 3,948 | 100.0% | 100.0% | 3,841 | 100.0% | 100.0% | +107 | 0.0pp |