Population
Service age groups
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.
Related topics
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.
Key insight
In 2021, Mid-life adults (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 Mid-life adults (35 to 49), which increased by 1,024 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.
This area boundary has changed from 2016 to 2021. As a result, 2016 values are mapped onto 2021 suburb boundaries using ABS concordance.
Chart view
Age structure - Service age groups snapshot
2021 distribution by category for Alkimos, with comparison markers for Wanneroo (C).
Early childhood (0 to 4)
Primary school age (5 to 11)
Secondary school age (12 to 17)
Young adults (18 to 24)
Early career adults (25 to 34)
Mid-life adults (35 to 49)
Pre-retirement adults (50 to 59)
Retirement transition (60 to 69)
Established seniors (70 to 84)
Advanced age (85 years and over)
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Early childhood (0 to 4)
+312
-1.3pp
Primary school age (5 to 11)
+580
+1.3pp
Secondary school age (12 to 17)
+359
+1.0pp
Young adults (18 to 24)
+156
-2.6pp
Early career adults (25 to 34)
+435
-5.5pp
Mid-life adults (35 to 49)
+1,024
+1.7pp
Pre-retirement adults (50 to 59)
+508
+2.0pp
Retirement transition (60 to 69)
+315
+1.7pp
Established seniors (70 to 84)
+220
+1.6pp
Advanced age (85 years 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 | |
| Early childhood (0 to 4) | 1,025 | 10.0% | 7.1% | 713 | 11.3% | 8.0% | +312 | -1.3pp |
| Primary school age (5 to 11) | 1,290 | 12.6% | 10.6% | 710 | 11.3% | 10.8% | +580 | +1.3pp |
| Secondary school age (12 to 17) | 759 | 7.4% | 8.5% | 400 | 6.4% | 8.5% | +359 | +1.0pp |
| Young adults (18 to 24) | 828 | 8.1% | 9.0% | 672 | 10.7% | 9.6% | +156 | -2.6pp |
| Early career adults (25 to 34) | 2,034 | 19.9% | 13.9% | 1,599 | 25.4% | 15.7% | +435 | -5.5pp |
| Mid-life adults (35 to 49) | 2,396 | 23.5% | 21.7% | 1,372 | 21.8% | 22.4% | +1,024 | +1.7pp |
| Pre-retirement adults (50 to 59) | 983 | 9.6% | 12.5% | 475 | 7.6% | 11.2% | +508 | +2.0pp |
| Retirement transition (60 to 69) | 542 | 5.3% | 8.5% | 227 | 3.6% | 7.4% | +315 | +1.7pp |
| Established seniors (70 to 84) | 322 | 3.2% | 7.0% | 102 | 1.6% | 5.4% | +220 | +1.6pp |
| Advanced age (85 years and over) | 38 | 0.4% | 1.3% | 3 | 0.0% | 1.0% | +35 | +0.4pp |
| Total | 10,203 | 100.0% | 100.0% | 6,282 | 100.0% | 100.0% | +3,921 | 0.0pp |