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, Elderly aged (85 and over) was the most common category among residents in Pinjarra Hills, accounting for 28.3% (218 people). This share was higher than Brisbane (C) (1.8%). Since 2016, the biggest change was in Elderly aged (85 and over), which increased by 99 people and 8.7 percentage points.
Section overview
Age structure - Service age groups
Pinjarra Hills - Total persons (Usual residence)
This table summarises service age groups for Pinjarra Hills in 2021 for persons, with comparison against Brisbane (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Pinjarra Hills, with comparison markers for Brisbane (C).
Babies and pre-schoolers (0 to 4)
2021 count
18
% of total
2.3%
Change from 2016
-0.5pp
18
2.3%
-0.5pp
Primary schoolers (5 to 11)
2021 count
38
% of total
4.9%
Change from 2016
-2.5pp
38
4.9%
-2.5pp
Secondary schoolers (12 to 17)
2021 count
48
% of total
6.2%
Change from 2016
+1.1pp
48
6.2%
+1.1pp
Tertiary education and independence (18 to 24)
2021 count
31
% of total
4.0%
Change from 2016
-2.3pp
31
4.0%
-2.3pp
Young workforce (25 to 34)
2021 count
30
% of total
3.9%
Change from 2016
-0.6pp
30
3.9%
-0.6pp
Parents and homebuilders (35 to 49)
2021 count
98
% of total
12.7%
Change from 2016
+2.6pp
98
12.7%
+2.6pp
Older workers and pre-retirees (50 to 59)
2021 count
78
% of total
10.1%
Change from 2016
-1.6pp
78
10.1%
-1.6pp
Empty nesters and retirees (60 to 69)
2021 count
79
% of total
10.2%
Change from 2016
-0.4pp
79
10.2%
-0.4pp
Seniors (70 to 84)
2021 count
174
% of total
22.6%
Change from 2016
+3.0pp
174
22.6%
+3.0pp
Elderly aged (85 and over)
2021 count
218
% of total
28.3%
Change from 2016
+8.7pp
218
28.3%
+8.7pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+1
-0.5pp
Primary schoolers (5 to 11)
-7
-2.5pp
Secondary schoolers (12 to 17)
+17
+1.1pp
Tertiary education and independence (18 to 24)
-7
-2.3pp
Young workforce (25 to 34)
+3
-0.6pp
Parents and homebuilders (35 to 49)
+37
+2.6pp
Older workers and pre-retirees (50 to 59)
+7
-1.6pp
Empty nesters and retirees (60 to 69)
+15
-0.4pp
Seniors (70 to 84)
+55
+3.0pp
Elderly aged (85 and over)
+99
+8.7pp
Data table
Service age groups for Pinjarra Hills. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Brisbane (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Brisbane (C)% | Count | % | Brisbane (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 18 | 2.3% | 5.5% | 17 | 2.8% | 6.0% | +1 | -0.5pp |
| Primary schoolers (5 to 11) | 38 | 4.9% | 8.4% | 45 | 7.4% | 8.3% | -7 | -2.5pp |
| Secondary schoolers (12 to 17) | 48 | 6.2% | 7.0% | 31 | 5.1% | 6.7% | +17 | +1.1pp |
| Tertiary education and independence (18 to 24) | 31 | 4.0% | 10.4% | 38 | 6.3% | 11.5% | -7 | -2.3pp |
| Young workforce (25 to 34) | 30 | 3.9% | 16.6% | 27 | 4.5% | 17.3% | +3 | -0.6pp |
| Parents and homebuilders (35 to 49) | 98 | 12.7% | 22.1% | 61 | 10.1% | 21.5% | +37 | +2.6pp |
| Older workers and pre-retirees (50 to 59) | 78 | 10.1% | 11.8% | 71 | 11.7% | 11.6% | +7 | -1.6pp |
| Empty nesters and retirees (60 to 69) | 79 | 10.2% | 8.8% | 64 | 10.6% | 8.6% | +15 | -0.4pp |
| Seniors (70 to 84) | 174 | 22.6% | 7.7% | 119 | 19.6% | 6.6% | +55 | +3.0pp |
| Elderly aged (85 and over) | 218 | 28.3% | 1.8% | 119 | 19.6% | 1.8% | +99 | +8.7pp |
| Total | 771 | 100.0% | 100.0% | 606 | 100.0% | 100.0% | +165 | 0.0pp |