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 Dundas (S), accounting for 18.9% (128 people). This share was higher than Regional WA (12.4%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which decreased by 52 people and 5 percentage points.
Section overview
Age structure - Service age groups
Dundas (S) - Total persons (Usual residence)
This table summarises service age groups for Dundas (S) in 2021 for persons, with comparison against Regional WA and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Dundas (S), with comparison markers for Regional WA.
Babies and pre-schoolers (0 to 4)
2021 count
33
% of total
4.9%
Change from 2016
+3.0pp
33
4.9%
+3.0pp
Primary schoolers (5 to 11)
2021 count
36
% of total
5.3%
Change from 2016
-3.1pp
36
5.3%
-3.1pp
Secondary schoolers (12 to 17)
2021 count
27
% of total
4.0%
Change from 2016
-1.2pp
27
4.0%
-1.2pp
Tertiary education and independence (18 to 24)
2021 count
55
% of total
8.1%
Change from 2016
+3.6pp
55
8.1%
+3.6pp
Young workforce (25 to 34)
2021 count
85
% of total
12.6%
Change from 2016
-2.6pp
85
12.6%
-2.6pp
Parents and homebuilders (35 to 49)
2021 count
99
% of total
14.6%
Change from 2016
-5.0pp
99
14.6%
-5.0pp
Older workers and pre-retirees (50 to 59)
2021 count
125
% of total
18.5%
Change from 2016
-0.3pp
125
18.5%
-0.3pp
Empty nesters and retirees (60 to 69)
2021 count
128
% of total
18.9%
Change from 2016
+3.5pp
128
18.9%
+3.5pp
Seniors (70 to 84)
2021 count
64
% of total
9.5%
Change from 2016
+0.7pp
64
9.5%
+0.7pp
Elderly aged (85 and over)
2021 count
5
% of total
0.7%
Change from 2016
-0.2pp
5
0.7%
-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)
+18
+3.0pp
Primary schoolers (5 to 11)
-29
-3.1pp
Secondary schoolers (12 to 17)
-13
-1.2pp
Tertiary education and independence (18 to 24)
+20
+3.6pp
Young workforce (25 to 34)
-32
-2.6pp
Parents and homebuilders (35 to 49)
-52
-5.0pp
Older workers and pre-retirees (50 to 59)
-20
-0.3pp
Empty nesters and retirees (60 to 69)
+9
+3.5pp
Seniors (70 to 84)
-4
+0.7pp
Elderly aged (85 and over)
-2
-0.2pp
Data table
Service age groups for Dundas (S). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Regional WA.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional WA% | Count | % | Regional WA% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 33 | 4.9% | 6.0% | 15 | 1.9% | 6.6% | +18 | +3.0pp |
| Primary schoolers (5 to 11) | 36 | 5.3% | 9.5% | 65 | 8.4% | 9.8% | -29 | -3.1pp |
| Secondary schoolers (12 to 17) | 27 | 4.0% | 7.6% | 40 | 5.2% | 7.4% | -13 | -1.2pp |
| Tertiary education and independence (18 to 24) | 55 | 8.1% | 6.7% | 35 | 4.5% | 7.0% | +20 | +3.6pp |
| Young workforce (25 to 34) | 85 | 12.6% | 12.5% | 117 | 15.2% | 13.6% | -32 | -2.6pp |
| Parents and homebuilders (35 to 49) | 99 | 14.6% | 19.9% | 151 | 19.6% | 20.8% | -52 | -5.0pp |
| Older workers and pre-retirees (50 to 59) | 125 | 18.5% | 13.7% | 145 | 18.8% | 14.1% | -20 | -0.3pp |
| Empty nesters and retirees (60 to 69) | 128 | 18.9% | 12.4% | 119 | 15.4% | 11.3% | +9 | +3.5pp |
| Seniors (70 to 84) | 64 | 9.5% | 10.1% | 68 | 8.8% | 7.8% | -4 | +0.7pp |
| Elderly aged (85 and over) | 5 | 0.7% | 1.7% | 7 | 0.9% | 1.5% | -2 | -0.2pp |
| Total | 677 | 100.0% | 100.0% | 772 | 100.0% | 100.0% | -95 | 0.0pp |