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 Ashby (WA), accounting for 20.4% (580 people). This share was lower than Wanneroo (C) (21.7%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 61 people and 1.3 percentage points.
Section overview
Age structure - Service age groups
Ashby (WA) - Total persons (Usual residence)
This table summarises service age groups for Ashby (WA) in 2021 for persons, with comparison against Wanneroo (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Ashby (WA), with comparison markers for Wanneroo (C).
Babies and pre-schoolers (0 to 4)
2021 count
201
% of total
7.1%
Change from 2016
-1.5pp
201
7.1%
-1.5pp
Primary schoolers (5 to 11)
2021 count
271
% of total
9.5%
Change from 2016
+0.2pp
271
9.5%
+0.2pp
Secondary schoolers (12 to 17)
2021 count
182
% of total
6.4%
Change from 2016
+1.3pp
182
6.4%
+1.3pp
Tertiary education and independence (18 to 24)
2021 count
206
% of total
7.2%
Change from 2016
-0.8pp
206
7.2%
-0.8pp
Young workforce (25 to 34)
2021 count
372
% of total
13.1%
Change from 2016
-2.1pp
372
13.1%
-2.1pp
Parents and homebuilders (35 to 49)
2021 count
580
% of total
20.4%
Change from 2016
-0.2pp
580
20.4%
-0.2pp
Older workers and pre-retirees (50 to 59)
2021 count
293
% of total
10.3%
Change from 2016
+0.5pp
293
10.3%
+0.5pp
Empty nesters and retirees (60 to 69)
2021 count
258
% of total
9.1%
Change from 2016
+1.0pp
258
9.1%
+1.0pp
Seniors (70 to 84)
2021 count
393
% of total
13.8%
Change from 2016
+1.3pp
393
13.8%
+1.3pp
Elderly aged (85 and over)
2021 count
95
% of total
3.3%
Change from 2016
+1.3pp
95
3.3%
+1.3pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-27
-1.5pp
Primary schoolers (5 to 11)
+24
+0.2pp
Secondary schoolers (12 to 17)
+46
+1.3pp
Tertiary education and independence (18 to 24)
-6
-0.8pp
Young workforce (25 to 34)
-33
-2.1pp
Parents and homebuilders (35 to 49)
+30
-0.2pp
Older workers and pre-retirees (50 to 59)
+33
+0.5pp
Empty nesters and retirees (60 to 69)
+43
+1.0pp
Seniors (70 to 84)
+61
+1.3pp
Elderly aged (85 and over)
+43
+1.3pp
Data table
Service age groups for Ashby (WA). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Wanneroo (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Wanneroo (C)% | Count | % | Wanneroo (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 201 | 7.1% | 7.1% | 228 | 8.6% | 8.0% | -27 | -1.5pp |
| Primary schoolers (5 to 11) | 271 | 9.5% | 10.6% | 247 | 9.3% | 10.8% | +24 | +0.2pp |
| Secondary schoolers (12 to 17) | 182 | 6.4% | 8.5% | 136 | 5.1% | 8.5% | +46 | +1.3pp |
| Tertiary education and independence (18 to 24) | 206 | 7.2% | 9.0% | 212 | 8.0% | 9.6% | -6 | -0.8pp |
| Young workforce (25 to 34) | 372 | 13.1% | 13.9% | 405 | 15.2% | 15.7% | -33 | -2.1pp |
| Parents and homebuilders (35 to 49) | 580 | 20.4% | 21.7% | 550 | 20.6% | 22.4% | +30 | -0.2pp |
| Older workers and pre-retirees (50 to 59) | 293 | 10.3% | 12.5% | 260 | 9.8% | 11.2% | +33 | +0.5pp |
| Empty nesters and retirees (60 to 69) | 258 | 9.1% | 8.5% | 215 | 8.1% | 7.4% | +43 | +1.0pp |
| Seniors (70 to 84) | 393 | 13.8% | 7.0% | 332 | 12.5% | 5.4% | +61 | +1.3pp |
| Elderly aged (85 and over) | 95 | 3.3% | 1.3% | 52 | 2.0% | 1.0% | +43 | +1.3pp |
| Total | 2,850 | 100.0% | 100.0% | 2,665 | 100.0% | 100.0% | +185 | 0.0pp |