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, Older workers and pre-retirees (50 to 59) was the most common category among residents in Humbug Scrub (part), accounting for 23.2% (95 people). This share was higher than Playford (C) (11.6%). Since 2016, the biggest change was in Tertiary education and independence (18 to 24), which decreased by 28 people and 6.6 percentage points.
Section overview
Age structure - Service age groups
Humbug Scrub (part) - Total persons (Usual residence)
This table summarises service age groups for Humbug Scrub (part) in 2021 for persons, with comparison against Playford (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Humbug Scrub (part), with comparison markers for Playford (C).
Babies and pre-schoolers (0 to 4)
2021 count
21
% of total
5.1%
Change from 2016
+2.0pp
21
5.1%
+2.0pp
Primary schoolers (5 to 11)
2021 count
27
% of total
6.6%
Change from 2016
-0.1pp
27
6.6%
-0.1pp
Secondary schoolers (12 to 17)
2021 count
21
% of total
5.1%
Change from 2016
-0.7pp
21
5.1%
-0.7pp
Tertiary education and independence (18 to 24)
2021 count
15
% of total
3.7%
Change from 2016
-6.6pp
15
3.7%
-6.6pp
Young workforce (25 to 34)
2021 count
18
% of total
4.4%
Change from 2016
-3.1pp
18
4.4%
-3.1pp
Parents and homebuilders (35 to 49)
2021 count
67
% of total
16.3%
Change from 2016
0.0pp
67
16.3%
0.0pp
Older workers and pre-retirees (50 to 59)
2021 count
95
% of total
23.2%
Change from 2016
-2.3pp
95
23.2%
-2.3pp
Empty nesters and retirees (60 to 69)
2021 count
88
% of total
21.5%
Change from 2016
+3.2pp
88
21.5%
+3.2pp
Seniors (70 to 84)
2021 count
47
% of total
11.5%
Change from 2016
+2.8pp
47
11.5%
+2.8pp
Elderly aged (85 and over)
2021 count
5
% of total
1.2%
Change from 2016
0.0pp
5
1.2%
0.0pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+8
+2.0pp
Primary schoolers (5 to 11)
-1
-0.1pp
Secondary schoolers (12 to 17)
-3
-0.7pp
Tertiary education and independence (18 to 24)
-28
-6.6pp
Young workforce (25 to 34)
-13
-3.1pp
Parents and homebuilders (35 to 49)
-1
0.0pp
Older workers and pre-retirees (50 to 59)
-11
-2.3pp
Empty nesters and retirees (60 to 69)
+12
+3.2pp
Seniors (70 to 84)
+11
+2.8pp
Elderly aged (85 and over)
0
0.0pp
Data table
Service age groups for Humbug Scrub (part). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Playford (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Playford (C)% | Count | % | Playford (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 21 | 5.1% | 7.5% | 13 | 3.1% | 8.6% | +8 | +2.0pp |
| Primary schoolers (5 to 11) | 27 | 6.6% | 11.0% | 28 | 6.7% | 10.6% | -1 | -0.1pp |
| Secondary schoolers (12 to 17) | 21 | 5.1% | 8.1% | 24 | 5.8% | 7.8% | -3 | -0.7pp |
| Tertiary education and independence (18 to 24) | 15 | 3.7% | 9.5% | 43 | 10.3% | 10.5% | -28 | -6.6pp |
| Young workforce (25 to 34) | 18 | 4.4% | 15.9% | 31 | 7.5% | 15.3% | -13 | -3.1pp |
| Parents and homebuilders (35 to 49) | 67 | 16.3% | 18.5% | 68 | 16.3% | 18.2% | -1 | 0.0pp |
| Older workers and pre-retirees (50 to 59) | 95 | 23.2% | 11.6% | 106 | 25.5% | 12.3% | -11 | -2.3pp |
| Empty nesters and retirees (60 to 69) | 88 | 21.5% | 9.1% | 76 | 18.3% | 8.4% | +12 | +3.2pp |
| Seniors (70 to 84) | 47 | 11.5% | 7.2% | 36 | 8.7% | 6.9% | +11 | +2.8pp |
| Elderly aged (85 and over) | 5 | 1.2% | 1.6% | 5 | 1.2% | 1.5% | 0 | 0.0pp |
| Total | 410 | 100.0% | 100.0% | 416 | 100.0% | 100.0% | -6 | 0.0pp |