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 Yalgoo (S), accounting for 30.3% (103 people). This share was higher than Regional WA (12.5%). Since 2016, the biggest change was in Young workforce (25 to 34), which increased by 37 people and 10.7 percentage points.
Section overview
Age structure - Service age groups
Yalgoo (S) - Total persons (Usual residence)
This table summarises service age groups for Yalgoo (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 Yalgoo (S), with comparison markers for Regional WA.
Babies and pre-schoolers (0 to 4)
2021 count
13
% of total
3.8%
Change from 2016
+2.0pp
13
3.8%
+2.0pp
Primary schoolers (5 to 11)
2021 count
0
% of total
0.0%
Change from 2016
-5.3pp
0
0.0%
-5.3pp
Secondary schoolers (12 to 17)
2021 count
3
% of total
0.9%
Change from 2016
-3.8pp
3
0.9%
-3.8pp
Tertiary education and independence (18 to 24)
2021 count
33
% of total
9.7%
Change from 2016
+3.2pp
33
9.7%
+3.2pp
Young workforce (25 to 34)
2021 count
103
% of total
30.3%
Change from 2016
+10.7pp
103
30.3%
+10.7pp
Parents and homebuilders (35 to 49)
2021 count
59
% of total
17.4%
Change from 2016
-7.2pp
59
17.4%
-7.2pp
Older workers and pre-retirees (50 to 59)
2021 count
52
% of total
15.3%
Change from 2016
-3.4pp
52
15.3%
-3.4pp
Empty nesters and retirees (60 to 69)
2021 count
40
% of total
11.8%
Change from 2016
-1.6pp
40
11.8%
-1.6pp
Seniors (70 to 84)
2021 count
15
% of total
4.4%
Change from 2016
+0.2pp
15
4.4%
+0.2pp
Elderly aged (85 and over)
2021 count
4
% of total
1.2%
Change from 2016
+0.3pp
4
1.2%
+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)
+7
+2.0pp
Primary schoolers (5 to 11)
-18
-5.3pp
Secondary schoolers (12 to 17)
-13
-3.8pp
Tertiary education and independence (18 to 24)
+11
+3.2pp
Young workforce (25 to 34)
+37
+10.7pp
Parents and homebuilders (35 to 49)
-24
-7.2pp
Older workers and pre-retirees (50 to 59)
-11
-3.4pp
Empty nesters and retirees (60 to 69)
-5
-1.6pp
Seniors (70 to 84)
+1
+0.2pp
Elderly aged (85 and over)
+1
+0.3pp
Data table
Service age groups for Yalgoo (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) | 13 | 3.8% | 6.0% | 6 | 1.8% | 6.6% | +7 | +2.0pp |
| Primary schoolers (5 to 11) | 0 | 0.0% | 9.5% | 18 | 5.3% | 9.8% | -18 | -5.3pp |
| Secondary schoolers (12 to 17) | 3 | 0.9% | 7.6% | 16 | 4.7% | 7.4% | -13 | -3.8pp |
| Tertiary education and independence (18 to 24) | 33 | 9.7% | 6.7% | 22 | 6.5% | 7.0% | +11 | +3.2pp |
| Young workforce (25 to 34) | 103 | 30.3% | 12.5% | 66 | 19.6% | 13.6% | +37 | +10.7pp |
| Parents and homebuilders (35 to 49) | 59 | 17.4% | 19.9% | 83 | 24.6% | 20.8% | -24 | -7.2pp |
| Older workers and pre-retirees (50 to 59) | 52 | 15.3% | 13.7% | 63 | 18.7% | 14.1% | -11 | -3.4pp |
| Empty nesters and retirees (60 to 69) | 40 | 11.8% | 12.4% | 45 | 13.4% | 11.3% | -5 | -1.6pp |
| Seniors (70 to 84) | 15 | 4.4% | 10.1% | 14 | 4.2% | 7.8% | +1 | +0.2pp |
| Elderly aged (85 and over) | 4 | 1.2% | 1.7% | 3 | 0.9% | 1.5% | +1 | +0.3pp |
| Total | 340 | 100.0% | 100.0% | 337 | 100.0% | 100.0% | +3 | 0.0pp |