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 Marion, accounting for 16.7% (684 people). This share was lower than Marion (C) (20.2%). Since 2016, the biggest change was in Young workforce (25 to 34), which increased by 136 people and 2.8 percentage points.
Section overview
Age structure - Service age groups
Marion - Total persons (Usual residence)
This table summarises service age groups for Marion in 2021 for persons, with comparison against Marion (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Marion, with comparison markers for Marion (C).
Babies and pre-schoolers (0 to 4)
2021 count
179
% of total
4.4%
Change from 2016
-0.1pp
179
4.4%
-0.1pp
Primary schoolers (5 to 11)
2021 count
225
% of total
5.5%
Change from 2016
-0.4pp
225
5.5%
-0.4pp
Secondary schoolers (12 to 17)
2021 count
289
% of total
7.0%
Change from 2016
-1.2pp
289
7.0%
-1.2pp
Tertiary education and independence (18 to 24)
2021 count
368
% of total
9.0%
Change from 2016
+0.7pp
368
9.0%
+0.7pp
Young workforce (25 to 34)
2021 count
598
% of total
14.6%
Change from 2016
+2.8pp
598
14.6%
+2.8pp
Parents and homebuilders (35 to 49)
2021 count
684
% of total
16.7%
Change from 2016
+0.4pp
684
16.7%
+0.4pp
Older workers and pre-retirees (50 to 59)
2021 count
418
% of total
10.2%
Change from 2016
-0.4pp
418
10.2%
-0.4pp
Empty nesters and retirees (60 to 69)
2021 count
425
% of total
10.4%
Change from 2016
-0.5pp
425
10.4%
-0.5pp
Seniors (70 to 84)
2021 count
660
% of total
16.1%
Change from 2016
+0.2pp
660
16.1%
+0.2pp
Elderly aged (85 and over)
2021 count
279
% of total
6.8%
Change from 2016
-0.3pp
279
6.8%
-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)
+4
-0.1pp
Primary schoolers (5 to 11)
-5
-0.4pp
Secondary schoolers (12 to 17)
-31
-1.2pp
Tertiary education and independence (18 to 24)
+43
+0.7pp
Young workforce (25 to 34)
+136
+2.8pp
Parents and homebuilders (35 to 49)
+48
+0.4pp
Older workers and pre-retirees (50 to 59)
+3
-0.4pp
Empty nesters and retirees (60 to 69)
0
-0.5pp
Seniors (70 to 84)
+39
+0.2pp
Elderly aged (85 and over)
+1
-0.3pp
Data table
Service age groups for Marion. 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) | 179 | 4.4% | 5.4% | 175 | 4.5% | 5.9% | +4 | -0.1pp |
| Primary schoolers (5 to 11) | 225 | 5.5% | 7.7% | 230 | 5.9% | 7.4% | -5 | -0.4pp |
| Secondary schoolers (12 to 17) | 289 | 7.0% | 6.1% | 320 | 8.2% | 6.1% | -31 | -1.2pp |
| Tertiary education and independence (18 to 24) | 368 | 9.0% | 8.8% | 325 | 8.3% | 9.6% | +43 | +0.7pp |
| Young workforce (25 to 34) | 598 | 14.6% | 15.1% | 462 | 11.8% | 14.8% | +136 | +2.8pp |
| Parents and homebuilders (35 to 49) | 684 | 16.7% | 20.2% | 636 | 16.3% | 19.5% | +48 | +0.4pp |
| Older workers and pre-retirees (50 to 59) | 418 | 10.2% | 11.7% | 415 | 10.6% | 13.0% | +3 | -0.4pp |
| Empty nesters and retirees (60 to 69) | 425 | 10.4% | 11.8% | 425 | 10.9% | 11.4% | 0 | -0.5pp |
| Seniors (70 to 84) | 660 | 16.1% | 10.4% | 621 | 15.9% | 9.1% | +39 | +0.2pp |
| Elderly aged (85 and over) | 279 | 6.8% | 2.9% | 278 | 7.1% | 3.1% | +1 | -0.3pp |
| Total | 4,101 | 100.0% | 100.0% | 3,902 | 100.0% | 100.0% | +199 | 0.0pp |