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 Bridgetown-Greenbushes (S), accounting for 18.1% (947 people). This share was higher than Regional WA (12.4%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 283 people and 4 percentage points.
Section overview
Age structure - Service age groups
Bridgetown-Greenbushes (S) - Total persons (Usual residence)
This table summarises service age groups for Bridgetown-Greenbushes (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 Bridgetown-Greenbushes (S), with comparison markers for Regional WA.
Babies and pre-schoolers (0 to 4)
2021 count
233
% of total
4.4%
Change from 2016
0.0pp
233
4.4%
0.0pp
Primary schoolers (5 to 11)
2021 count
417
% of total
8.0%
Change from 2016
-1.2pp
417
8.0%
-1.2pp
Secondary schoolers (12 to 17)
2021 count
405
% of total
7.7%
Change from 2016
-0.1pp
405
7.7%
-0.1pp
Tertiary education and independence (18 to 24)
2021 count
244
% of total
4.7%
Change from 2016
0.0pp
244
4.7%
0.0pp
Young workforce (25 to 34)
2021 count
363
% of total
6.9%
Change from 2016
+0.6pp
363
6.9%
+0.6pp
Parents and homebuilders (35 to 49)
2021 count
869
% of total
16.6%
Change from 2016
-1.1pp
869
16.6%
-1.1pp
Older workers and pre-retirees (50 to 59)
2021 count
793
% of total
15.1%
Change from 2016
-1.0pp
793
15.1%
-1.0pp
Empty nesters and retirees (60 to 69)
2021 count
947
% of total
18.1%
Change from 2016
-0.6pp
947
18.1%
-0.6pp
Seniors (70 to 84)
2021 count
870
% of total
16.6%
Change from 2016
+4.0pp
870
16.6%
+4.0pp
Elderly aged (85 and over)
2021 count
102
% of total
1.9%
Change from 2016
0.0pp
102
1.9%
0.0pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+30
0.0pp
Primary schoolers (5 to 11)
-11
-1.2pp
Secondary schoolers (12 to 17)
+43
-0.1pp
Tertiary education and independence (18 to 24)
+26
0.0pp
Young workforce (25 to 34)
+69
+0.6pp
Parents and homebuilders (35 to 49)
+46
-1.1pp
Older workers and pre-retirees (50 to 59)
+44
-1.0pp
Empty nesters and retirees (60 to 69)
+75
-0.6pp
Seniors (70 to 84)
+283
+4.0pp
Elderly aged (85 and over)
+12
0.0pp
Data table
Service age groups for Bridgetown-Greenbushes (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) | 233 | 4.4% | 6.0% | 203 | 4.4% | 6.6% | +30 | 0.0pp |
| Primary schoolers (5 to 11) | 417 | 8.0% | 9.5% | 428 | 9.2% | 9.8% | -11 | -1.2pp |
| Secondary schoolers (12 to 17) | 405 | 7.7% | 7.6% | 362 | 7.8% | 7.4% | +43 | -0.1pp |
| Tertiary education and independence (18 to 24) | 244 | 4.7% | 6.7% | 218 | 4.7% | 7.0% | +26 | 0.0pp |
| Young workforce (25 to 34) | 363 | 6.9% | 12.5% | 294 | 6.3% | 13.6% | +69 | +0.6pp |
| Parents and homebuilders (35 to 49) | 869 | 16.6% | 19.9% | 823 | 17.7% | 20.8% | +46 | -1.1pp |
| Older workers and pre-retirees (50 to 59) | 793 | 15.1% | 13.7% | 749 | 16.1% | 14.1% | +44 | -1.0pp |
| Empty nesters and retirees (60 to 69) | 947 | 18.1% | 12.4% | 872 | 18.7% | 11.3% | +75 | -0.6pp |
| Seniors (70 to 84) | 870 | 16.6% | 10.1% | 587 | 12.6% | 7.8% | +283 | +4.0pp |
| Elderly aged (85 and over) | 102 | 1.9% | 1.7% | 90 | 1.9% | 1.5% | +12 | 0.0pp |
| Total | 5,238 | 100.0% | 100.0% | 4,660 | 100.0% | 100.0% | +578 | 0.0pp |