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 Cockburn (C), accounting for 22.6% (26,707 people). This share was higher than Greater Perth (21%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 2,734 people, while its share fell by 0.3 percentage points.
Section overview
Age structure - Service age groups
Cockburn (C) - Total persons (Usual residence)
This table summarises service age groups for Cockburn (C) in 2021 for persons, with comparison against Greater Perth and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Cockburn (C), with comparison markers for Greater Perth.
Babies and pre-schoolers (0 to 4)
2021 count
7,883
% of total
6.7%
Change from 2016
-0.6pp
7,883
6.7%
-0.6pp
Primary schoolers (5 to 11)
2021 count
10,747
% of total
9.1%
Change from 2016
-0.2pp
10,747
9.1%
-0.2pp
Secondary schoolers (12 to 17)
2021 count
8,223
% of total
7.0%
Change from 2016
-0.1pp
8,223
7.0%
-0.1pp
Tertiary education and independence (18 to 24)
2021 count
10,086
% of total
8.5%
Change from 2016
-0.4pp
10,086
8.5%
-0.4pp
Young workforce (25 to 34)
2021 count
17,888
% of total
15.1%
Change from 2016
-1.0pp
17,888
15.1%
-1.0pp
Parents and homebuilders (35 to 49)
2021 count
26,707
% of total
22.6%
Change from 2016
-0.3pp
26,707
22.6%
-0.3pp
Older workers and pre-retirees (50 to 59)
2021 count
14,562
% of total
12.3%
Change from 2016
+0.2pp
14,562
12.3%
+0.2pp
Empty nesters and retirees (60 to 69)
2021 count
11,175
% of total
9.5%
Change from 2016
+0.8pp
11,175
9.5%
+0.8pp
Seniors (70 to 84)
2021 count
8,986
% of total
7.6%
Change from 2016
+1.3pp
8,986
7.6%
+1.3pp
Elderly aged (85 and over)
2021 count
1,801
% of total
1.5%
Change from 2016
+0.1pp
1,801
1.5%
+0.1pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+301
-0.6pp
Primary schoolers (5 to 11)
+1,040
-0.2pp
Secondary schoolers (12 to 17)
+800
-0.1pp
Tertiary education and independence (18 to 24)
+771
-0.4pp
Young workforce (25 to 34)
+1,095
-1.0pp
Parents and homebuilders (35 to 49)
+2,734
-0.3pp
Older workers and pre-retirees (50 to 59)
+1,973
+0.2pp
Empty nesters and retirees (60 to 69)
+2,056
+0.8pp
Seniors (70 to 84)
+2,430
+1.3pp
Elderly aged (85 and over)
+376
+0.1pp
Data table
Service age groups for Cockburn (C). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Greater Perth.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Greater Perth% | Count | % | Greater Perth% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 7,883 | 6.7% | 6.1% | 7,582 | 7.3% | 6.5% | +301 | -0.6pp |
| Primary schoolers (5 to 11) | 10,747 | 9.1% | 9.0% | 9,707 | 9.3% | 9.0% | +1,040 | -0.2pp |
| Secondary schoolers (12 to 17) | 8,223 | 7.0% | 7.4% | 7,423 | 7.1% | 7.2% | +800 | -0.1pp |
| Tertiary education and independence (18 to 24) | 10,086 | 8.5% | 8.6% | 9,315 | 8.9% | 9.4% | +771 | -0.4pp |
| Young workforce (25 to 34) | 17,888 | 15.1% | 14.4% | 16,793 | 16.1% | 15.8% | +1,095 | -1.0pp |
| Parents and homebuilders (35 to 49) | 26,707 | 22.6% | 21.0% | 23,973 | 22.9% | 20.9% | +2,734 | -0.3pp |
| Older workers and pre-retirees (50 to 59) | 14,562 | 12.3% | 12.4% | 12,589 | 12.1% | 12.2% | +1,973 | +0.2pp |
| Empty nesters and retirees (60 to 69) | 11,175 | 9.5% | 10.2% | 9,119 | 8.7% | 9.7% | +2,056 | +0.8pp |
| Seniors (70 to 84) | 8,986 | 7.6% | 9.1% | 6,556 | 6.3% | 7.5% | +2,430 | +1.3pp |
| Elderly aged (85 and over) | 1,801 | 1.5% | 1.9% | 1,425 | 1.4% | 1.8% | +376 | +0.1pp |
| Total | 118,091 | 100.0% | 100.0% | 104,473 | 100.0% | 100.0% | +13,618 | 0.0pp |