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, Young workforce (25 to 34) was the most common category among residents in South Yarra (part), accounting for 34.1% (8,525 people). This share was higher than Stonnington (C) (22.7%). Since 2016, the biggest change was in Young workforce (25 to 34), which increased by 8,519 people and 30.8 percentage points.
Section overview
Age structure - Service age groups
South Yarra (part) - Total persons (Usual residence)
This table summarises service age groups for South Yarra (part) in 2021 for persons, with comparison against Stonnington (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for South Yarra (part), with comparison markers for Stonnington (C).
Babies and pre-schoolers (0 to 4)
2021 count
693
% of total
2.8%
Change from 2016
-1.6pp
693
2.8%
-1.6pp
Primary schoolers (5 to 11)
2021 count
767
% of total
3.1%
Change from 2016
-0.8pp
767
3.1%
-0.8pp
Secondary schoolers (12 to 17)
2021 count
680
% of total
2.7%
Change from 2016
-3.4pp
680
2.7%
-3.4pp
Tertiary education and independence (18 to 24)
2021 count
2,560
% of total
10.2%
Change from 2016
-4.7pp
2,560
10.2%
-4.7pp
Young workforce (25 to 34)
2021 count
8,525
% of total
34.1%
Change from 2016
+30.8pp
8,525
34.1%
+30.8pp
Parents and homebuilders (35 to 49)
2021 count
5,431
% of total
21.7%
Change from 2016
-1.5pp
5,431
21.7%
-1.5pp
Older workers and pre-retirees (50 to 59)
2021 count
2,324
% of total
9.3%
Change from 2016
-7.8pp
2,324
9.3%
-7.8pp
Empty nesters and retirees (60 to 69)
2021 count
1,851
% of total
7.4%
Change from 2016
+5.2pp
1,851
7.4%
+5.2pp
Seniors (70 to 84)
2021 count
1,846
% of total
7.4%
Change from 2016
-0.9pp
1,846
7.4%
-0.9pp
Elderly aged (85 and over)
2021 count
359
% of total
1.4%
Change from 2016
-0.3pp
359
1.4%
-0.3pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+685
-1.6pp
Primary schoolers (5 to 11)
+760
-0.8pp
Secondary schoolers (12 to 17)
+669
-3.4pp
Tertiary education and independence (18 to 24)
+2,533
-4.7pp
Young workforce (25 to 34)
+8,519
+30.8pp
Parents and homebuilders (35 to 49)
+5,389
-1.5pp
Older workers and pre-retirees (50 to 59)
+2,293
-7.8pp
Empty nesters and retirees (60 to 69)
+1,847
+5.2pp
Seniors (70 to 84)
+1,831
-0.9pp
Elderly aged (85 and over)
+356
-0.3pp
Data table
Service age groups for South Yarra (part). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Stonnington (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Stonnington (C)% | Count | % | Stonnington (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 693 | 2.8% | 3.8% | 8 | 4.4% | 4.2% | +685 | -1.6pp |
| Primary schoolers (5 to 11) | 767 | 3.1% | 5.2% | 7 | 3.9% | 5.8% | +760 | -0.8pp |
| Secondary schoolers (12 to 17) | 680 | 2.7% | 5.0% | 11 | 6.1% | 4.8% | +669 | -3.4pp |
| Tertiary education and independence (18 to 24) | 2,560 | 10.2% | 9.7% | 27 | 14.9% | 11.3% | +2,533 | -4.7pp |
| Young workforce (25 to 34) | 8,525 | 34.1% | 22.7% | 6 | 3.3% | 23.8% | +8,519 | +30.8pp |
| Parents and homebuilders (35 to 49) | 5,431 | 21.7% | 20.2% | 42 | 23.2% | 19.8% | +5,389 | -1.5pp |
| Older workers and pre-retirees (50 to 59) | 2,324 | 9.3% | 11.6% | 31 | 17.1% | 10.6% | +2,293 | -7.8pp |
| Empty nesters and retirees (60 to 69) | 1,851 | 7.4% | 9.2% | 4 | 2.2% | 9.0% | +1,847 | +5.2pp |
| Seniors (70 to 84) | 1,846 | 7.4% | 10.0% | 15 | 8.3% | 8.4% | +1,831 | -0.9pp |
| Elderly aged (85 and over) | 359 | 1.4% | 2.6% | 3 | 1.7% | 2.4% | +356 | -0.3pp |
| Total | 25,028 | 100.0% | 100.0% | 181 | 100.0% | 100.0% | +24,847 | 0.0pp |