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 Alkimos, accounting for 23.5% (2,396 people). This share was higher than Wanneroo (C) (21.7%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 1,027 people and 1.7 percentage points.
Section overview
Age structure - Service age groups
Alkimos - Total persons (Usual residence)
This table summarises service age groups for Alkimos in 2021 for persons, with comparison against Wanneroo (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Alkimos, with comparison markers for Wanneroo (C).
Babies and pre-schoolers (0 to 4)
2021 count
1,025
% of total
10.0%
Change from 2016
-1.3pp
1,025
10.0%
-1.3pp
Primary schoolers (5 to 11)
2021 count
1,290
% of total
12.6%
Change from 2016
+1.3pp
1,290
12.6%
+1.3pp
Secondary schoolers (12 to 17)
2021 count
759
% of total
7.4%
Change from 2016
+1.0pp
759
7.4%
+1.0pp
Tertiary education and independence (18 to 24)
2021 count
828
% of total
8.1%
Change from 2016
-2.6pp
828
8.1%
-2.6pp
Young workforce (25 to 34)
2021 count
2,034
% of total
19.9%
Change from 2016
-5.5pp
2,034
19.9%
-5.5pp
Parents and homebuilders (35 to 49)
2021 count
2,396
% of total
23.5%
Change from 2016
+1.7pp
2,396
23.5%
+1.7pp
Older workers and pre-retirees (50 to 59)
2021 count
983
% of total
9.6%
Change from 2016
+2.0pp
983
9.6%
+2.0pp
Empty nesters and retirees (60 to 69)
2021 count
542
% of total
5.3%
Change from 2016
+1.7pp
542
5.3%
+1.7pp
Seniors (70 to 84)
2021 count
322
% of total
3.2%
Change from 2016
+1.6pp
322
3.2%
+1.6pp
Elderly aged (85 and over)
2021 count
38
% of total
0.4%
Change from 2016
+0.4pp
38
0.4%
+0.4pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+314
-1.3pp
Primary schoolers (5 to 11)
+581
+1.3pp
Secondary schoolers (12 to 17)
+360
+1.0pp
Tertiary education and independence (18 to 24)
+158
-2.6pp
Young workforce (25 to 34)
+439
-5.5pp
Parents and homebuilders (35 to 49)
+1,027
+1.7pp
Older workers and pre-retirees (50 to 59)
+509
+2.0pp
Empty nesters and retirees (60 to 69)
+315
+1.7pp
Seniors (70 to 84)
+220
+1.6pp
Elderly aged (85 and over)
+35
+0.4pp
Data table
Service age groups for Alkimos. 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) | 1,025 | 10.0% | 7.1% | 711 | 11.3% | 8.0% | +314 | -1.3pp |
| Primary schoolers (5 to 11) | 1,290 | 12.6% | 10.6% | 709 | 11.3% | 10.8% | +581 | +1.3pp |
| Secondary schoolers (12 to 17) | 759 | 7.4% | 8.5% | 399 | 6.4% | 8.5% | +360 | +1.0pp |
| Tertiary education and independence (18 to 24) | 828 | 8.1% | 9.0% | 670 | 10.7% | 9.6% | +158 | -2.6pp |
| Young workforce (25 to 34) | 2,034 | 19.9% | 13.9% | 1,595 | 25.4% | 15.7% | +439 | -5.5pp |
| Parents and homebuilders (35 to 49) | 2,396 | 23.5% | 21.7% | 1,369 | 21.8% | 22.4% | +1,027 | +1.7pp |
| Older workers and pre-retirees (50 to 59) | 983 | 9.6% | 12.5% | 474 | 7.6% | 11.2% | +509 | +2.0pp |
| Empty nesters and retirees (60 to 69) | 542 | 5.3% | 8.5% | 227 | 3.6% | 7.4% | +315 | +1.7pp |
| Seniors (70 to 84) | 322 | 3.2% | 7.0% | 102 | 1.6% | 5.4% | +220 | +1.6pp |
| Elderly aged (85 and over) | 38 | 0.4% | 1.3% | 3 | 0.0% | 1.0% | +35 | +0.4pp |
| Total | 10,203 | 100.0% | 100.0% | 6,269 | 100.0% | 100.0% | +3,934 | 0.0pp |