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, Older workers and pre-retirees (50 to 59) was the most common category among residents in Woodridge (WA), accounting for 18.2% (116 people). This share was higher than Gingin (S) (16.3%). Since 2016, the biggest change was in Older workers and pre-retirees (50 to 59), which increased by 46 people and 7.3 percentage points.
Section overview
Age structure - Service age groups
Woodridge (WA) - Total persons (Usual residence)
This table summarises service age groups for Woodridge (WA) in 2021 for persons, with comparison against Gingin (S) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Woodridge (WA), with comparison markers for Gingin (S).
Babies and pre-schoolers (0 to 4)
2021 count
21
% of total
3.3%
Change from 2016
-1.4pp
21
3.3%
-1.4pp
Primary schoolers (5 to 11)
2021 count
52
% of total
8.1%
Change from 2016
-2.3pp
52
8.1%
-2.3pp
Secondary schoolers (12 to 17)
2021 count
51
% of total
8.0%
Change from 2016
-1.3pp
51
8.0%
-1.3pp
Tertiary education and independence (18 to 24)
2021 count
35
% of total
5.5%
Change from 2016
+0.5pp
35
5.5%
+0.5pp
Young workforce (25 to 34)
2021 count
53
% of total
8.3%
Change from 2016
-2.4pp
53
8.3%
-2.4pp
Parents and homebuilders (35 to 49)
2021 count
113
% of total
17.7%
Change from 2016
-3.7pp
113
17.7%
-3.7pp
Older workers and pre-retirees (50 to 59)
2021 count
116
% of total
18.2%
Change from 2016
+7.3pp
116
18.2%
+7.3pp
Empty nesters and retirees (60 to 69)
2021 count
84
% of total
13.1%
Change from 2016
-0.1pp
84
13.1%
-0.1pp
Seniors (70 to 84)
2021 count
88
% of total
13.8%
Change from 2016
-0.5pp
88
13.8%
-0.5pp
Elderly aged (85 and over)
2021 count
12
% of total
1.9%
Change from 2016
+1.3pp
12
1.9%
+1.3pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-9
-1.4pp
Primary schoolers (5 to 11)
-15
-2.3pp
Secondary schoolers (12 to 17)
-9
-1.3pp
Tertiary education and independence (18 to 24)
+3
+0.5pp
Young workforce (25 to 34)
-16
-2.4pp
Parents and homebuilders (35 to 49)
-25
-3.7pp
Older workers and pre-retirees (50 to 59)
+46
+7.3pp
Empty nesters and retirees (60 to 69)
-1
-0.1pp
Seniors (70 to 84)
-4
-0.5pp
Elderly aged (85 and over)
+8
+1.3pp
Data table
Service age groups for Woodridge (WA). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Gingin (S).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Gingin (S)% | Count | % | Gingin (S)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 21 | 3.3% | 4.4% | 30 | 4.7% | 4.8% | -9 | -1.4pp |
| Primary schoolers (5 to 11) | 52 | 8.1% | 6.6% | 67 | 10.4% | 8.5% | -15 | -2.3pp |
| Secondary schoolers (12 to 17) | 51 | 8.0% | 6.4% | 60 | 9.3% | 6.5% | -9 | -1.3pp |
| Tertiary education and independence (18 to 24) | 35 | 5.5% | 5.1% | 32 | 5.0% | 5.4% | +3 | +0.5pp |
| Young workforce (25 to 34) | 53 | 8.3% | 10.1% | 69 | 10.7% | 9.6% | -16 | -2.4pp |
| Parents and homebuilders (35 to 49) | 113 | 17.7% | 16.6% | 138 | 21.4% | 17.8% | -25 | -3.7pp |
| Older workers and pre-retirees (50 to 59) | 116 | 18.2% | 16.3% | 70 | 10.9% | 15.0% | +46 | +7.3pp |
| Empty nesters and retirees (60 to 69) | 84 | 13.1% | 16.6% | 85 | 13.2% | 18.3% | -1 | -0.1pp |
| Seniors (70 to 84) | 88 | 13.8% | 16.0% | 92 | 14.3% | 12.4% | -4 | -0.5pp |
| Elderly aged (85 and over) | 12 | 1.9% | 1.6% | 4 | 0.6% | 1.3% | +8 | +1.3pp |
| Total | 639 | 100.0% | 100.0% | 645 | 100.0% | 100.0% | -6 | 0.0pp |