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 Mariginiup, accounting for 16.3% (143 people). This share was lower than Wanneroo (C) (21.7%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 44 people and 4.8 percentage points.
Section overview
Age structure - Service age groups
Mariginiup - Total persons (Usual residence)
This table summarises service age groups for Mariginiup in 2021 for persons, with comparison against Wanneroo (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Mariginiup, with comparison markers for Wanneroo (C).
Babies and pre-schoolers (0 to 4)
2021 count
25
% of total
2.9%
Change from 2016
-0.7pp
25
2.9%
-0.7pp
Primary schoolers (5 to 11)
2021 count
83
% of total
9.5%
Change from 2016
+1.7pp
83
9.5%
+1.7pp
Secondary schoolers (12 to 17)
2021 count
71
% of total
8.1%
Change from 2016
-1.6pp
71
8.1%
-1.6pp
Tertiary education and independence (18 to 24)
2021 count
75
% of total
8.6%
Change from 2016
-0.2pp
75
8.6%
-0.2pp
Young workforce (25 to 34)
2021 count
75
% of total
8.6%
Change from 2016
-1.5pp
75
8.6%
-1.5pp
Parents and homebuilders (35 to 49)
2021 count
143
% of total
16.3%
Change from 2016
-1.4pp
143
16.3%
-1.4pp
Older workers and pre-retirees (50 to 59)
2021 count
140
% of total
16.0%
Change from 2016
-2.9pp
140
16.0%
-2.9pp
Empty nesters and retirees (60 to 69)
2021 count
142
% of total
16.2%
Change from 2016
-1.3pp
142
16.2%
-1.3pp
Seniors (70 to 84)
2021 count
92
% of total
10.5%
Change from 2016
+4.8pp
92
10.5%
+4.8pp
Elderly aged (85 and over)
2021 count
0
% of total
0.0%
Change from 2016
-0.6pp
0
0.0%
-0.6pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-5
-0.7pp
Primary schoolers (5 to 11)
+18
+1.7pp
Secondary schoolers (12 to 17)
-10
-1.6pp
Tertiary education and independence (18 to 24)
+1
-0.2pp
Young workforce (25 to 34)
-10
-1.5pp
Parents and homebuilders (35 to 49)
-5
-1.4pp
Older workers and pre-retirees (50 to 59)
-18
-2.9pp
Empty nesters and retirees (60 to 69)
-5
-1.3pp
Seniors (70 to 84)
+44
+4.8pp
Elderly aged (85 and over)
-5
-0.6pp
Data table
Service age groups for Mariginiup. 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) | 25 | 2.9% | 7.1% | 30 | 3.6% | 8.0% | -5 | -0.7pp |
| Primary schoolers (5 to 11) | 83 | 9.5% | 10.6% | 65 | 7.8% | 10.8% | +18 | +1.7pp |
| Secondary schoolers (12 to 17) | 71 | 8.1% | 8.5% | 81 | 9.7% | 8.5% | -10 | -1.6pp |
| Tertiary education and independence (18 to 24) | 75 | 8.6% | 9.0% | 74 | 8.8% | 9.6% | +1 | -0.2pp |
| Young workforce (25 to 34) | 75 | 8.6% | 13.9% | 85 | 10.1% | 15.7% | -10 | -1.5pp |
| Parents and homebuilders (35 to 49) | 143 | 16.3% | 21.7% | 148 | 17.7% | 22.4% | -5 | -1.4pp |
| Older workers and pre-retirees (50 to 59) | 140 | 16.0% | 12.5% | 158 | 18.9% | 11.2% | -18 | -2.9pp |
| Empty nesters and retirees (60 to 69) | 142 | 16.2% | 8.5% | 147 | 17.5% | 7.4% | -5 | -1.3pp |
| Seniors (70 to 84) | 92 | 10.5% | 7.0% | 48 | 5.7% | 5.4% | +44 | +4.8pp |
| Elderly aged (85 and over) | 0 | 0.0% | 1.3% | 5 | 0.6% | 1.0% | -5 | -0.6pp |
| Total | 876 | 100.0% | 100.0% | 838 | 100.0% | 100.0% | +38 | 0.0pp |