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, Retirement transition (60 to 69) was the most common category among residents in Wilmington (part), accounting for 19.6% (131 people). This share was lower than Mount Remarkable (DC) (21.9%). Since 2016, the biggest change was in Retirement transition (60 to 69), which increased by 32 people and 2.6 percentage points.
Section overview
Age structure - Service age groups
Wilmington (part) - Total persons (Usual residence)
This table summarises service age groups for Wilmington (part) in 2021 for persons, with comparison against Mount Remarkable (DC) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Wilmington (part), with comparison markers for Mount Remarkable (DC).
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)
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Early childhood (0 to 4)
+15
+1.6pp
Primary school age (5 to 11)
+9
+0.3pp
Secondary school age (12 to 17)
-6
-1.9pp
Young adults (18 to 24)
+5
0.0pp
Early career adults (25 to 34)
+16
+1.6pp
Mid-life adults (35 to 49)
+7
-1.1pp
Pre-retirement adults (50 to 59)
-11
-4.2pp
Retirement transition (60 to 69)
+32
+2.6pp
Established seniors (70 to 84)
+17
+0.7pp
Advanced age (85 years and over)
+4
+0.4pp
Data table
Service age groups for Wilmington (part). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Mount Remarkable (DC).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mount Remarkable (DC)% | Count | % | Mount Remarkable (DC)% | Count | pp | |
| Early childhood (0 to 4) | 46 | 6.9% | 3.9% | 31 | 5.3% | 3.9% | +15 | +1.6pp |
| Primary school age (5 to 11) | 55 | 8.2% | 6.3% | 46 | 7.9% | 7.2% | +9 | +0.3pp |
| Secondary school age (12 to 17) | 39 | 5.8% | 6.6% | 45 | 7.7% | 6.4% | -6 | -1.9pp |
| Young adults (18 to 24) | 37 | 5.5% | 4.2% | 32 | 5.5% | 5.3% | +5 | 0.0pp |
| Early career adults (25 to 34) | 54 | 8.1% | 7.2% | 38 | 6.5% | 6.4% | +16 | +1.6pp |
| Mid-life adults (35 to 49) | 104 | 15.6% | 13.3% | 97 | 16.7% | 15.3% | +7 | -1.1pp |
| Pre-retirement adults (50 to 59) | 104 | 15.6% | 17.0% | 115 | 19.8% | 19.1% | -11 | -4.2pp |
| Retirement transition (60 to 69) | 131 | 19.6% | 21.9% | 99 | 17.0% | 17.8% | +32 | +2.6pp |
| Established seniors (70 to 84) | 102 | 15.3% | 16.8% | 85 | 14.6% | 15.1% | +17 | +0.7pp |
| Advanced age (85 years and over) | 14 | 2.1% | 2.7% | 10 | 1.7% | 3.0% | +4 | +0.4pp |
| Total | 667 | 100.0% | 100.0% | 581 | 100.0% | 100.0% | +86 | 0.0pp |