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 No usual address (SA), accounting for 22.4% (758 people). This share was higher than South Australia (18.9%). Since 2016, the biggest change was in Primary schoolers (5 to 11), which increased by 102 people and 2.5 percentage points.
Section overview
Age structure - Service age groups
No usual address (SA) - Total persons (Usual residence)
This table summarises service age groups for No usual address (SA) in 2021 for persons, with comparison against South Australia and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for No usual address (SA), with comparison markers for South Australia.
Babies and pre-schoolers (0 to 4)
2021 count
137
% of total
4.1%
Change from 2016
+1.0pp
137
4.1%
+1.0pp
Primary schoolers (5 to 11)
2021 count
205
% of total
6.1%
Change from 2016
+2.5pp
205
6.1%
+2.5pp
Secondary schoolers (12 to 17)
2021 count
166
% of total
4.9%
Change from 2016
+0.2pp
166
4.9%
+0.2pp
Tertiary education and independence (18 to 24)
2021 count
292
% of total
8.6%
Change from 2016
-3.6pp
292
8.6%
-3.6pp
Young workforce (25 to 34)
2021 count
621
% of total
18.4%
Change from 2016
-1.0pp
621
18.4%
-1.0pp
Parents and homebuilders (35 to 49)
2021 count
758
% of total
22.4%
Change from 2016
-0.5pp
758
22.4%
-0.5pp
Older workers and pre-retirees (50 to 59)
2021 count
483
% of total
14.3%
Change from 2016
-1.1pp
483
14.3%
-1.1pp
Empty nesters and retirees (60 to 69)
2021 count
474
% of total
14.0%
Change from 2016
+0.8pp
474
14.0%
+0.8pp
Seniors (70 to 84)
2021 count
210
% of total
6.2%
Change from 2016
+0.8pp
210
6.2%
+0.8pp
Elderly aged (85 and over)
2021 count
11
% of total
0.3%
Change from 2016
-0.6pp
11
0.3%
-0.6pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+49
+1.0pp
Primary schoolers (5 to 11)
+102
+2.5pp
Secondary schoolers (12 to 17)
+32
+0.2pp
Tertiary education and independence (18 to 24)
-57
-3.6pp
Young workforce (25 to 34)
+66
-1.0pp
Parents and homebuilders (35 to 49)
+101
-0.5pp
Older workers and pre-retirees (50 to 59)
+42
-1.1pp
Empty nesters and retirees (60 to 69)
+95
+0.8pp
Seniors (70 to 84)
+55
+0.8pp
Elderly aged (85 and over)
-14
-0.6pp
Data table
Service age groups for No usual address (SA). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with South Australia.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | South Australia% | Count | % | South Australia% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 137 | 4.1% | 5.3% | 88 | 3.1% | 5.8% | +49 | +1.0pp |
| Primary schoolers (5 to 11) | 205 | 6.1% | 8.2% | 103 | 3.6% | 8.3% | +102 | +2.5pp |
| Secondary schoolers (12 to 17) | 166 | 4.9% | 6.9% | 134 | 4.7% | 7.0% | +32 | +0.2pp |
| Tertiary education and independence (18 to 24) | 292 | 8.6% | 8.3% | 349 | 12.2% | 8.9% | -57 | -3.6pp |
| Young workforce (25 to 34) | 621 | 18.4% | 13.2% | 555 | 19.4% | 13.0% | +66 | -1.0pp |
| Parents and homebuilders (35 to 49) | 758 | 22.4% | 18.9% | 657 | 22.9% | 19.2% | +101 | -0.5pp |
| Older workers and pre-retirees (50 to 59) | 483 | 14.3% | 12.9% | 441 | 15.4% | 13.4% | +42 | -1.1pp |
| Empty nesters and retirees (60 to 69) | 474 | 14.0% | 12.1% | 379 | 13.2% | 11.8% | +95 | +0.8pp |
| Seniors (70 to 84) | 210 | 6.2% | 11.6% | 155 | 5.4% | 9.9% | +55 | +0.8pp |
| Elderly aged (85 and over) | 11 | 0.3% | 2.7% | 25 | 0.9% | 2.7% | -14 | -0.6pp |
| Total | 3,377 | 100.0% | 100.0% | 2,863 | 100.0% | 100.0% | +514 | 0.0pp |