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 Boyup Brook (S), accounting for 18.5% (340 people). This share was lower than Regional WA (19.9%). Since 2016, the biggest change was in Tertiary education and independence (18 to 24), which increased by 42 people and 2 percentage points.
Section overview
Age structure - Service age groups
Boyup Brook (S) - Total persons (Usual residence)
This table summarises service age groups for Boyup Brook (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 Boyup Brook (S), with comparison markers for Regional WA.
Babies and pre-schoolers (0 to 4)
2021 count
105
% of total
5.7%
Change from 2016
0.0pp
105
5.7%
0.0pp
Primary schoolers (5 to 11)
2021 count
172
% of total
9.4%
Change from 2016
-0.1pp
172
9.4%
-0.1pp
Secondary schoolers (12 to 17)
2021 count
114
% of total
6.2%
Change from 2016
+0.6pp
114
6.2%
+0.6pp
Tertiary education and independence (18 to 24)
2021 count
98
% of total
5.3%
Change from 2016
+2.0pp
98
5.3%
+2.0pp
Young workforce (25 to 34)
2021 count
126
% of total
6.9%
Change from 2016
-0.6pp
126
6.9%
-0.6pp
Parents and homebuilders (35 to 49)
2021 count
340
% of total
18.5%
Change from 2016
-1.1pp
340
18.5%
-1.1pp
Older workers and pre-retirees (50 to 59)
2021 count
283
% of total
15.4%
Change from 2016
-0.6pp
283
15.4%
-0.6pp
Empty nesters and retirees (60 to 69)
2021 count
271
% of total
14.8%
Change from 2016
-0.8pp
271
14.8%
-0.8pp
Seniors (70 to 84)
2021 count
263
% of total
14.3%
Change from 2016
+0.9pp
263
14.3%
+0.9pp
Elderly aged (85 and over)
2021 count
40
% of total
2.2%
Change from 2016
-0.2pp
40
2.2%
-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)
+8
0.0pp
Primary schoolers (5 to 11)
+10
-0.1pp
Secondary schoolers (12 to 17)
+19
+0.6pp
Tertiary education and independence (18 to 24)
+42
+2.0pp
Young workforce (25 to 34)
-2
-0.6pp
Parents and homebuilders (35 to 49)
+7
-1.1pp
Older workers and pre-retirees (50 to 59)
+10
-0.6pp
Empty nesters and retirees (60 to 69)
+5
-0.8pp
Seniors (70 to 84)
+35
+0.9pp
Elderly aged (85 and over)
0
-0.2pp
Data table
Service age groups for Boyup Brook (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) | 105 | 5.7% | 6.0% | 97 | 5.7% | 6.6% | +8 | 0.0pp |
| Primary schoolers (5 to 11) | 172 | 9.4% | 9.5% | 162 | 9.5% | 9.8% | +10 | -0.1pp |
| Secondary schoolers (12 to 17) | 114 | 6.2% | 7.6% | 95 | 5.6% | 7.4% | +19 | +0.6pp |
| Tertiary education and independence (18 to 24) | 98 | 5.3% | 6.7% | 56 | 3.3% | 7.0% | +42 | +2.0pp |
| Young workforce (25 to 34) | 126 | 6.9% | 12.5% | 128 | 7.5% | 13.6% | -2 | -0.6pp |
| Parents and homebuilders (35 to 49) | 340 | 18.5% | 19.9% | 333 | 19.6% | 20.8% | +7 | -1.1pp |
| Older workers and pre-retirees (50 to 59) | 283 | 15.4% | 13.7% | 273 | 16.0% | 14.1% | +10 | -0.6pp |
| Empty nesters and retirees (60 to 69) | 271 | 14.8% | 12.4% | 266 | 15.6% | 11.3% | +5 | -0.8pp |
| Seniors (70 to 84) | 263 | 14.3% | 10.1% | 228 | 13.4% | 7.8% | +35 | +0.9pp |
| Elderly aged (85 and over) | 40 | 2.2% | 1.7% | 40 | 2.4% | 1.5% | 0 | -0.2pp |
| Total | 1,834 | 100.0% | 100.0% | 1,701 | 100.0% | 100.0% | +133 | 0.0pp |