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 Quinns Rocks, accounting for 20.7% (1,835 people). This share was lower than Wanneroo (C) (21.7%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 1,801 people and 4.1 percentage points.
Section overview
Age structure - Service age groups
Quinns Rocks - Total persons (Usual residence)
This table summarises service age groups for Quinns Rocks in 2021 for persons, with comparison against Wanneroo (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Quinns Rocks, with comparison markers for Wanneroo (C).
Babies and pre-schoolers (0 to 4)
2021 count
471
% of total
5.3%
Change from 2016
-2.0pp
471
5.3%
-2.0pp
Primary schoolers (5 to 11)
2021 count
846
% of total
9.5%
Change from 2016
+1.7pp
846
9.5%
+1.7pp
Secondary schoolers (12 to 17)
2021 count
884
% of total
10.0%
Change from 2016
+2.2pp
884
10.0%
+2.2pp
Tertiary education and independence (18 to 24)
2021 count
886
% of total
10.0%
Change from 2016
+7.1pp
886
10.0%
+7.1pp
Young workforce (25 to 34)
2021 count
1,013
% of total
11.4%
Change from 2016
+1.6pp
1,013
11.4%
+1.6pp
Parents and homebuilders (35 to 49)
2021 count
1,835
% of total
20.7%
Change from 2016
+4.1pp
1,835
20.7%
+4.1pp
Older workers and pre-retirees (50 to 59)
2021 count
1,478
% of total
16.7%
Change from 2016
+3.5pp
1,478
16.7%
+3.5pp
Empty nesters and retirees (60 to 69)
2021 count
819
% of total
9.2%
Change from 2016
-15.7pp
819
9.2%
-15.7pp
Seniors (70 to 84)
2021 count
553
% of total
6.2%
Change from 2016
-3.6pp
553
6.2%
-3.6pp
Elderly aged (85 and over)
2021 count
77
% of total
0.9%
Change from 2016
-1.1pp
77
0.9%
-1.1pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+456
-2.0pp
Primary schoolers (5 to 11)
+830
+1.7pp
Secondary schoolers (12 to 17)
+868
+2.2pp
Tertiary education and independence (18 to 24)
+880
+7.1pp
Young workforce (25 to 34)
+993
+1.6pp
Parents and homebuilders (35 to 49)
+1,801
+4.1pp
Older workers and pre-retirees (50 to 59)
+1,451
+3.5pp
Empty nesters and retirees (60 to 69)
+768
-15.7pp
Seniors (70 to 84)
+533
-3.6pp
Elderly aged (85 and over)
+73
-1.1pp
Data table
Service age groups for Quinns Rocks. 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) | 471 | 5.3% | 7.1% | 15 | 7.3% | 8.0% | +456 | -2.0pp |
| Primary schoolers (5 to 11) | 846 | 9.5% | 10.6% | 16 | 7.8% | 10.8% | +830 | +1.7pp |
| Secondary schoolers (12 to 17) | 884 | 10.0% | 8.5% | 16 | 7.8% | 8.5% | +868 | +2.2pp |
| Tertiary education and independence (18 to 24) | 886 | 10.0% | 9.0% | 6 | 2.9% | 9.6% | +880 | +7.1pp |
| Young workforce (25 to 34) | 1,013 | 11.4% | 13.9% | 20 | 9.8% | 15.7% | +993 | +1.6pp |
| Parents and homebuilders (35 to 49) | 1,835 | 20.7% | 21.7% | 34 | 16.6% | 22.4% | +1,801 | +4.1pp |
| Older workers and pre-retirees (50 to 59) | 1,478 | 16.7% | 12.5% | 27 | 13.2% | 11.2% | +1,451 | +3.5pp |
| Empty nesters and retirees (60 to 69) | 819 | 9.2% | 8.5% | 51 | 24.9% | 7.4% | +768 | -15.7pp |
| Seniors (70 to 84) | 553 | 6.2% | 7.0% | 20 | 9.8% | 5.4% | +533 | -3.6pp |
| Elderly aged (85 and over) | 77 | 0.9% | 1.3% | 4 | 2.0% | 1.0% | +73 | -1.1pp |
| Total | 8,861 | 100.0% | 100.0% | 205 | 100.0% | 100.0% | +8,656 | 0.0pp |