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 Forestville (SA), accounting for 23.2% (325 people). This share was higher than Unley (C) (19.6%). Since 2016, the biggest change was in Empty nesters and retirees (60 to 69), which increased by 37 people and 2.6 percentage points.
Section overview
Age structure - Service age groups
Forestville (SA) - Total persons (Usual residence)
This table summarises service age groups for Forestville (SA) in 2021 for persons, with comparison against Unley (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Forestville (SA), with comparison markers for Unley (C).
Babies and pre-schoolers (0 to 4)
2021 count
68
% of total
4.9%
Change from 2016
-1.4pp
68
4.9%
-1.4pp
Primary schoolers (5 to 11)
2021 count
100
% of total
7.1%
Change from 2016
-1.5pp
100
7.1%
-1.5pp
Secondary schoolers (12 to 17)
2021 count
81
% of total
5.8%
Change from 2016
+1.2pp
81
5.8%
+1.2pp
Tertiary education and independence (18 to 24)
2021 count
104
% of total
7.4%
Change from 2016
-2.8pp
104
7.4%
-2.8pp
Young workforce (25 to 34)
2021 count
242
% of total
17.3%
Change from 2016
+0.5pp
242
17.3%
+0.5pp
Parents and homebuilders (35 to 49)
2021 count
325
% of total
23.2%
Change from 2016
-0.1pp
325
23.2%
-0.1pp
Older workers and pre-retirees (50 to 59)
2021 count
185
% of total
13.2%
Change from 2016
+0.5pp
185
13.2%
+0.5pp
Empty nesters and retirees (60 to 69)
2021 count
165
% of total
11.8%
Change from 2016
+2.6pp
165
11.8%
+2.6pp
Seniors (70 to 84)
2021 count
107
% of total
7.6%
Change from 2016
+2.6pp
107
7.6%
+2.6pp
Elderly aged (85 and over)
2021 count
26
% of total
1.9%
Change from 2016
+0.2pp
26
1.9%
+0.2pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-19
-1.4pp
Primary schoolers (5 to 11)
-19
-1.5pp
Secondary schoolers (12 to 17)
+17
+1.2pp
Tertiary education and independence (18 to 24)
-37
-2.8pp
Young workforce (25 to 34)
+8
+0.5pp
Parents and homebuilders (35 to 49)
+2
-0.1pp
Older workers and pre-retirees (50 to 59)
+8
+0.5pp
Empty nesters and retirees (60 to 69)
+37
+2.6pp
Seniors (70 to 84)
+37
+2.6pp
Elderly aged (85 and over)
+3
+0.2pp
Data table
Service age groups for Forestville (SA). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Unley (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Unley (C)% | Count | % | Unley (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 68 | 4.9% | 4.3% | 87 | 6.3% | 4.7% | -19 | -1.4pp |
| Primary schoolers (5 to 11) | 100 | 7.1% | 7.6% | 119 | 8.6% | 7.9% | -19 | -1.5pp |
| Secondary schoolers (12 to 17) | 81 | 5.8% | 6.9% | 64 | 4.6% | 6.6% | +17 | +1.2pp |
| Tertiary education and independence (18 to 24) | 104 | 7.4% | 8.2% | 141 | 10.2% | 9.4% | -37 | -2.8pp |
| Young workforce (25 to 34) | 242 | 17.3% | 12.4% | 234 | 16.8% | 13.5% | +8 | +0.5pp |
| Parents and homebuilders (35 to 49) | 325 | 23.2% | 19.6% | 323 | 23.3% | 19.8% | +2 | -0.1pp |
| Older workers and pre-retirees (50 to 59) | 185 | 13.2% | 12.6% | 177 | 12.7% | 12.7% | +8 | +0.5pp |
| Empty nesters and retirees (60 to 69) | 165 | 11.8% | 11.9% | 128 | 9.2% | 11.9% | +37 | +2.6pp |
| Seniors (70 to 84) | 107 | 7.6% | 12.2% | 70 | 5.0% | 9.2% | +37 | +2.6pp |
| Elderly aged (85 and over) | 26 | 1.9% | 4.1% | 23 | 1.7% | 4.3% | +3 | +0.2pp |
| Total | 1,400 | 100.0% | 100.0% | 1,389 | 100.0% | 100.0% | +11 | 0.0pp |