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 Marbelup, accounting for 20.1% (98 people). This share was higher than Albany (C) (17.1%). Since 2016, the biggest change was in Empty nesters and retirees (60 to 69), which increased by 31 people and 3.6 percentage points.
Section overview
Age structure - Service age groups
Marbelup - Total persons (Usual residence)
This table summarises service age groups for Marbelup in 2021 for persons, with comparison against Albany (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Marbelup, with comparison markers for Albany (C).
Babies and pre-schoolers (0 to 4)
2021 count
35
% of total
7.2%
Change from 2016
+0.3pp
35
7.2%
+0.3pp
Primary schoolers (5 to 11)
2021 count
55
% of total
11.3%
Change from 2016
-2.4pp
55
11.3%
-2.4pp
Secondary schoolers (12 to 17)
2021 count
54
% of total
11.1%
Change from 2016
+1.7pp
54
11.1%
+1.7pp
Tertiary education and independence (18 to 24)
2021 count
20
% of total
4.1%
Change from 2016
-1.9pp
20
4.1%
-1.9pp
Young workforce (25 to 34)
2021 count
49
% of total
10.1%
Change from 2016
-2.2pp
49
10.1%
-2.2pp
Parents and homebuilders (35 to 49)
2021 count
98
% of total
20.1%
Change from 2016
-4.2pp
98
20.1%
-4.2pp
Older workers and pre-retirees (50 to 59)
2021 count
68
% of total
14.0%
Change from 2016
-3.1pp
68
14.0%
-3.1pp
Empty nesters and retirees (60 to 69)
2021 count
65
% of total
13.3%
Change from 2016
+3.6pp
65
13.3%
+3.6pp
Seniors (70 to 84)
2021 count
24
% of total
4.9%
Change from 2016
+0.9pp
24
4.9%
+0.9pp
Elderly aged (85 and over)
2021 count
3
% of total
0.6%
Change from 2016
+0.6pp
3
0.6%
+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)
+11
+0.3pp
Primary schoolers (5 to 11)
+7
-2.4pp
Secondary schoolers (12 to 17)
+21
+1.7pp
Tertiary education and independence (18 to 24)
-1
-1.9pp
Young workforce (25 to 34)
+6
-2.2pp
Parents and homebuilders (35 to 49)
+13
-4.2pp
Older workers and pre-retirees (50 to 59)
+8
-3.1pp
Empty nesters and retirees (60 to 69)
+31
+3.6pp
Seniors (70 to 84)
+10
+0.9pp
Elderly aged (85 and over)
+3
+0.6pp
Data table
Service age groups for Marbelup. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Albany (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Albany (C)% | Count | % | Albany (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 35 | 7.2% | 5.0% | 24 | 6.9% | 5.4% | +11 | +0.3pp |
| Primary schoolers (5 to 11) | 55 | 11.3% | 8.3% | 48 | 13.7% | 8.8% | +7 | -2.4pp |
| Secondary schoolers (12 to 17) | 54 | 11.1% | 8.3% | 33 | 9.4% | 8.6% | +21 | +1.7pp |
| Tertiary education and independence (18 to 24) | 20 | 4.1% | 6.6% | 21 | 6.0% | 7.1% | -1 | -1.9pp |
| Young workforce (25 to 34) | 49 | 10.1% | 10.7% | 43 | 12.3% | 10.6% | +6 | -2.2pp |
| Parents and homebuilders (35 to 49) | 98 | 20.1% | 17.1% | 85 | 24.3% | 18.3% | +13 | -4.2pp |
| Older workers and pre-retirees (50 to 59) | 68 | 14.0% | 13.4% | 60 | 17.1% | 13.9% | +8 | -3.1pp |
| Empty nesters and retirees (60 to 69) | 65 | 13.3% | 13.9% | 34 | 9.7% | 13.3% | +31 | +3.6pp |
| Seniors (70 to 84) | 24 | 4.9% | 13.6% | 14 | 4.0% | 11.3% | +10 | +0.9pp |
| Elderly aged (85 and over) | 3 | 0.6% | 3.0% | 0 | 0.0% | 2.9% | +3 | +0.6pp |
| Total | 487 | 100.0% | 100.0% | 350 | 100.0% | 100.0% | +137 | 0.0pp |