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 Yilgarn (S), accounting for 22.5% (264 people). This share was higher than Regional WA (19.9%). Since 2016, the biggest change was in Primary schoolers (5 to 11), which decreased by 29 people and 2.3 percentage points.
Section overview
Age structure - Service age groups
Yilgarn (S) - Total persons (Usual residence)
This table summarises service age groups for Yilgarn (S) in 2021 for persons, with comparison against Regional WA and change since 2016.
Chart view
Age structure - Service age groups snapshot
2021 distribution by category for Yilgarn (S), with comparison markers for Regional WA.
Babies and pre-schoolers (0 to 4)
2021 count
41
% of total
3.5%
Change from 2016
-0.6pp
41
3.5%
-0.6pp
Primary schoolers (5 to 11)
2021 count
58
% of total
4.9%
Change from 2016
-2.3pp
58
4.9%
-2.3pp
Secondary schoolers (12 to 17)
2021 count
26
% of total
2.2%
Change from 2016
0.0pp
26
2.2%
0.0pp
Tertiary education and independence (18 to 24)
2021 count
58
% of total
4.9%
Change from 2016
-0.4pp
58
4.9%
-0.4pp
Young workforce (25 to 34)
2021 count
174
% of total
14.8%
Change from 2016
+0.3pp
174
14.8%
+0.3pp
Parents and homebuilders (35 to 49)
2021 count
264
% of total
22.5%
Change from 2016
+0.7pp
264
22.5%
+0.7pp
Older workers and pre-retirees (50 to 59)
2021 count
236
% of total
20.1%
Change from 2016
-0.4pp
236
20.1%
-0.4pp
Empty nesters and retirees (60 to 69)
2021 count
154
% of total
13.1%
Change from 2016
+0.2pp
154
13.1%
+0.2pp
Seniors (70 to 84)
2021 count
96
% of total
8.2%
Change from 2016
+0.1pp
96
8.2%
+0.1pp
Elderly aged (85 and over)
2021 count
25
% of total
2.1%
Change from 2016
+0.4pp
25
2.1%
+0.4pp
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-8
-0.6pp
Primary schoolers (5 to 11)
-29
-2.3pp
Secondary schoolers (12 to 17)
0
0.0pp
Tertiary education and independence (18 to 24)
-6
-0.4pp
Young workforce (25 to 34)
0
+0.3pp
Parents and homebuilders (35 to 49)
+2
+0.7pp
Older workers and pre-retirees (50 to 59)
-11
-0.4pp
Empty nesters and retirees (60 to 69)
-1
+0.2pp
Seniors (70 to 84)
-1
+0.1pp
Elderly aged (85 and over)
+5
+0.4pp
Data table
Service age groups for Yilgarn (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) | 41 | 3.5% | 6.0% | 49 | 4.1% | 6.6% | -8 | -0.6pp |
| Primary schoolers (5 to 11) | 58 | 4.9% | 9.5% | 87 | 7.2% | 9.8% | -29 | -2.3pp |
| Secondary schoolers (12 to 17) | 26 | 2.2% | 7.6% | 26 | 2.2% | 7.4% | 0 | 0.0pp |
| Tertiary education and independence (18 to 24) | 58 | 4.9% | 6.7% | 64 | 5.3% | 7.0% | -6 | -0.4pp |
| Young workforce (25 to 34) | 174 | 14.8% | 12.5% | 174 | 14.5% | 13.6% | 0 | +0.3pp |
| Parents and homebuilders (35 to 49) | 264 | 22.5% | 19.9% | 262 | 21.8% | 20.8% | +2 | +0.7pp |
| Older workers and pre-retirees (50 to 59) | 236 | 20.1% | 13.7% | 247 | 20.5% | 14.1% | -11 | -0.4pp |
| Empty nesters and retirees (60 to 69) | 154 | 13.1% | 12.4% | 155 | 12.9% | 11.3% | -1 | +0.2pp |
| Seniors (70 to 84) | 96 | 8.2% | 10.1% | 97 | 8.1% | 7.8% | -1 | +0.1pp |
| Elderly aged (85 and over) | 25 | 2.1% | 1.7% | 20 | 1.7% | 1.5% | +5 | +0.4pp |
| Total | 1,173 | 100.0% | 100.0% | 1,202 | 100.0% | 100.0% | -29 | 0.0pp |