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, Seniors (70 to 84) was the most common category among residents in Centennial Park (WA), accounting for 23.9% (165 people). This share was higher than Albany (C) (13.6%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 76 people and 7 percentage points.
Section overview
Age structure - Service age groups
Centennial Park (WA) - Total persons (Usual residence)
This table summarises service age groups for Centennial Park (WA) in 2021 for persons, with comparison against Albany (C) and change since 2016.
Chart view
Age structure - Service age groups snapshot
2021 distribution by category for Centennial Park (WA), with comparison markers for Albany (C).
Babies and pre-schoolers (0 to 4)
2021 count
22
% of total
3.2%
Change from 2016
-1.0pp
22
3.2%
-1.0pp
Primary schoolers (5 to 11)
2021 count
22
% of total
3.2%
Change from 2016
-2.7pp
22
3.2%
-2.7pp
Secondary schoolers (12 to 17)
2021 count
35
% of total
5.1%
Change from 2016
+2.6pp
35
5.1%
+2.6pp
Tertiary education and independence (18 to 24)
2021 count
79
% of total
11.5%
Change from 2016
+6.0pp
79
11.5%
+6.0pp
Young workforce (25 to 34)
2021 count
66
% of total
9.6%
Change from 2016
-6.0pp
66
9.6%
-6.0pp
Parents and homebuilders (35 to 49)
2021 count
87
% of total
12.6%
Change from 2016
-3.3pp
87
12.6%
-3.3pp
Older workers and pre-retirees (50 to 59)
2021 count
79
% of total
11.5%
Change from 2016
-2.4pp
79
11.5%
-2.4pp
Empty nesters and retirees (60 to 69)
2021 count
89
% of total
12.9%
Change from 2016
-9.5pp
89
12.9%
-9.5pp
Seniors (70 to 84)
2021 count
165
% of total
23.9%
Change from 2016
+7.0pp
165
23.9%
+7.0pp
Elderly aged (85 and over)
2021 count
51
% of total
7.4%
Change from 2016
+6.6pp
51
7.4%
+6.6pp
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
0
-1.0pp
Primary schoolers (5 to 11)
-9
-2.7pp
Secondary schoolers (12 to 17)
+22
+2.6pp
Tertiary education and independence (18 to 24)
+50
+6.0pp
Young workforce (25 to 34)
-16
-6.0pp
Parents and homebuilders (35 to 49)
+3
-3.3pp
Older workers and pre-retirees (50 to 59)
+6
-2.4pp
Empty nesters and retirees (60 to 69)
-29
-9.5pp
Seniors (70 to 84)
+76
+7.0pp
Elderly aged (85 and over)
+47
+6.6pp
Data table
Service age groups for Centennial Park (WA). 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) | 22 | 3.2% | 5.0% | 22 | 4.2% | 5.4% | 0 | -1.0pp |
| Primary schoolers (5 to 11) | 22 | 3.2% | 8.3% | 31 | 5.9% | 8.8% | -9 | -2.7pp |
| Secondary schoolers (12 to 17) | 35 | 5.1% | 8.3% | 13 | 2.5% | 8.6% | +22 | +2.6pp |
| Tertiary education and independence (18 to 24) | 79 | 11.5% | 6.6% | 29 | 5.5% | 7.1% | +50 | +6.0pp |
| Young workforce (25 to 34) | 66 | 9.6% | 10.7% | 82 | 15.6% | 10.6% | -16 | -6.0pp |
| Parents and homebuilders (35 to 49) | 87 | 12.6% | 17.1% | 84 | 15.9% | 18.3% | +3 | -3.3pp |
| Older workers and pre-retirees (50 to 59) | 79 | 11.5% | 13.4% | 73 | 13.9% | 13.9% | +6 | -2.4pp |
| Empty nesters and retirees (60 to 69) | 89 | 12.9% | 13.9% | 118 | 22.4% | 13.3% | -29 | -9.5pp |
| Seniors (70 to 84) | 165 | 23.9% | 13.6% | 89 | 16.9% | 11.3% | +76 | +7.0pp |
| Elderly aged (85 and over) | 51 | 7.4% | 3.0% | 4 | 0.8% | 2.9% | +47 | +6.6pp |
| Total | 689 | 100.0% | 100.0% | 527 | 100.0% | 100.0% | +162 | 0.0pp |