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 Glenalta, accounting for 21.5% (439 people). This share was higher than Mitcham (C) (19.9%). Since 2016, the biggest change was in Empty nesters and retirees (60 to 69), which decreased by 48 people and 2.8 percentage points.
Section overview
Age structure - Service age groups
Glenalta - Total persons (Usual residence)
This table summarises service age groups for Glenalta in 2021 for persons, with comparison against Mitcham (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Glenalta, with comparison markers for Mitcham (C).
Babies and pre-schoolers (0 to 4)
2021 count
127
% of total
6.2%
Change from 2016
+0.4pp
127
6.2%
+0.4pp
Primary schoolers (5 to 11)
2021 count
206
% of total
10.1%
Change from 2016
-0.2pp
206
10.1%
-0.2pp
Secondary schoolers (12 to 17)
2021 count
163
% of total
8.0%
Change from 2016
+1.3pp
163
8.0%
+1.3pp
Tertiary education and independence (18 to 24)
2021 count
139
% of total
6.8%
Change from 2016
0.0pp
139
6.8%
0.0pp
Young workforce (25 to 34)
2021 count
182
% of total
8.9%
Change from 2016
+0.6pp
182
8.9%
+0.6pp
Parents and homebuilders (35 to 49)
2021 count
439
% of total
21.5%
Change from 2016
+0.7pp
439
21.5%
+0.7pp
Older workers and pre-retirees (50 to 59)
2021 count
248
% of total
12.2%
Change from 2016
+0.1pp
248
12.2%
+0.1pp
Empty nesters and retirees (60 to 69)
2021 count
195
% of total
9.6%
Change from 2016
-2.8pp
195
9.6%
-2.8pp
Seniors (70 to 84)
2021 count
300
% of total
14.7%
Change from 2016
-1.0pp
300
14.7%
-1.0pp
Elderly aged (85 and over)
2021 count
45
% of total
2.2%
Change from 2016
+0.8pp
45
2.2%
+0.8pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+14
+0.4pp
Primary schoolers (5 to 11)
+4
-0.2pp
Secondary schoolers (12 to 17)
+31
+1.3pp
Tertiary education and independence (18 to 24)
+5
0.0pp
Young workforce (25 to 34)
+20
+0.6pp
Parents and homebuilders (35 to 49)
+31
+0.7pp
Older workers and pre-retirees (50 to 59)
+11
+0.1pp
Empty nesters and retirees (60 to 69)
-48
-2.8pp
Seniors (70 to 84)
-7
-1.0pp
Elderly aged (85 and over)
+17
+0.8pp
Data table
Service age groups for Glenalta. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Mitcham (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mitcham (C)% | Count | % | Mitcham (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 127 | 6.2% | 4.9% | 113 | 5.8% | 5.3% | +14 | +0.4pp |
| Primary schoolers (5 to 11) | 206 | 10.1% | 8.4% | 202 | 10.3% | 8.6% | +4 | -0.2pp |
| Secondary schoolers (12 to 17) | 163 | 8.0% | 7.7% | 132 | 6.7% | 7.5% | +31 | +1.3pp |
| Tertiary education and independence (18 to 24) | 139 | 6.8% | 8.6% | 134 | 6.8% | 9.1% | +5 | 0.0pp |
| Young workforce (25 to 34) | 182 | 8.9% | 10.5% | 162 | 8.3% | 10.7% | +20 | +0.6pp |
| Parents and homebuilders (35 to 49) | 439 | 21.5% | 19.9% | 408 | 20.8% | 20.0% | +31 | +0.7pp |
| Older workers and pre-retirees (50 to 59) | 248 | 12.2% | 12.9% | 237 | 12.1% | 13.4% | +11 | +0.1pp |
| Empty nesters and retirees (60 to 69) | 195 | 9.6% | 11.5% | 243 | 12.4% | 11.5% | -48 | -2.8pp |
| Seniors (70 to 84) | 300 | 14.7% | 12.2% | 307 | 15.7% | 10.4% | -7 | -1.0pp |
| Elderly aged (85 and over) | 45 | 2.2% | 3.3% | 28 | 1.4% | 3.4% | +17 | +0.8pp |
| Total | 2,039 | 100.0% | 100.0% | 1,959 | 100.0% | 100.0% | +80 | 0.0pp |