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, Empty nesters and retirees (60 to 69) was the most common category among residents in Hallett, accounting for 19.9% (33 people). This share was similar to Goyder (DC) (19.7%). Since 2016, the biggest change was in Empty nesters and retirees (60 to 69), which increased by 33 people and 19.9 percentage points.
Section overview
Age structure - Service age groups
Hallett - Total persons (Usual residence)
This table summarises service age groups for Hallett in 2021 for persons, with comparison against Goyder (DC) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Hallett, with comparison markers for Goyder (DC).
Babies and pre-schoolers (0 to 4)
2021 count
16
% of total
9.6%
Change from 2016
+9.6pp
16
9.6%
+9.6pp
Primary schoolers (5 to 11)
2021 count
25
% of total
15.1%
Change from 2016
+15.1pp
25
15.1%
+15.1pp
Secondary schoolers (12 to 17)
2021 count
15
% of total
9.0%
Change from 2016
+9.0pp
15
9.0%
+9.0pp
Tertiary education and independence (18 to 24)
2021 count
3
% of total
1.8%
Change from 2016
-15.8pp
3
1.8%
-15.8pp
Young workforce (25 to 34)
2021 count
7
% of total
4.2%
Change from 2016
+4.2pp
7
4.2%
+4.2pp
Parents and homebuilders (35 to 49)
2021 count
21
% of total
12.7%
Change from 2016
-4.9pp
21
12.7%
-4.9pp
Older workers and pre-retirees (50 to 59)
2021 count
28
% of total
16.9%
Change from 2016
+16.9pp
28
16.9%
+16.9pp
Empty nesters and retirees (60 to 69)
2021 count
33
% of total
19.9%
Change from 2016
+19.9pp
33
19.9%
+19.9pp
Seniors (70 to 84)
2021 count
3
% of total
1.8%
Change from 2016
+1.8pp
3
1.8%
+1.8pp
Elderly aged (85 and over)
2021 count
3
% of total
1.8%
Change from 2016
+1.8pp
3
1.8%
+1.8pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+16
+9.6pp
Primary schoolers (5 to 11)
+25
+15.1pp
Secondary schoolers (12 to 17)
+15
+9.0pp
Tertiary education and independence (18 to 24)
0
-15.8pp
Young workforce (25 to 34)
+7
+4.2pp
Parents and homebuilders (35 to 49)
+18
-4.9pp
Older workers and pre-retirees (50 to 59)
+28
+16.9pp
Empty nesters and retirees (60 to 69)
+33
+19.9pp
Seniors (70 to 84)
+3
+1.8pp
Elderly aged (85 and over)
+3
+1.8pp
Data table
Service age groups for Hallett. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Goyder (DC).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Goyder (DC)% | Count | % | Goyder (DC)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 16 | 9.6% | 4.3% | 0 | 0.0% | 4.8% | +16 | +9.6pp |
| Primary schoolers (5 to 11) | 25 | 15.1% | 7.5% | 0 | 0.0% | 7.6% | +25 | +15.1pp |
| Secondary schoolers (12 to 17) | 15 | 9.0% | 7.1% | 0 | 0.0% | 8.1% | +15 | +9.0pp |
| Tertiary education and independence (18 to 24) | 3 | 1.8% | 5.7% | 3 | 17.6% | 5.4% | 0 | -15.8pp |
| Young workforce (25 to 34) | 7 | 4.2% | 8.5% | 0 | 0.0% | 7.9% | +7 | +4.2pp |
| Parents and homebuilders (35 to 49) | 21 | 12.7% | 14.6% | 3 | 17.6% | 17.6% | +18 | -4.9pp |
| Older workers and pre-retirees (50 to 59) | 28 | 16.9% | 14.6% | 0 | 0.0% | 17.1% | +28 | +16.9pp |
| Empty nesters and retirees (60 to 69) | 33 | 19.9% | 19.7% | 0 | 0.0% | 16.3% | +33 | +19.9pp |
| Seniors (70 to 84) | 3 | 1.8% | 15.2% | 0 | 0.0% | 12.5% | +3 | +1.8pp |
| Elderly aged (85 and over) | 3 | 1.8% | 2.7% | 0 | 0.0% | 2.1% | +3 | +1.8pp |
| Total | 166 | 100.0% | 100.0% | 17 | 100.0% | 100.0% | +149 | 0.0pp |