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 Warnbro, accounting for 19% (2,058 people). This share was lower than Rockingham (C) (20.1%). Since 2016, the biggest change was in Empty nesters and retirees (60 to 69), which increased by 241 people and 2.1 percentage points.
Section overview
Age structure - Service age groups
Warnbro - Total persons (Usual residence)
This table summarises service age groups for Warnbro in 2021 for persons, with comparison against Rockingham (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Warnbro, with comparison markers for Rockingham (C).
Babies and pre-schoolers (0 to 4)
2021 count
694
% of total
6.4%
Change from 2016
-0.8pp
694
6.4%
-0.8pp
Primary schoolers (5 to 11)
2021 count
1,060
% of total
9.8%
Change from 2016
0.0pp
1,060
9.8%
0.0pp
Secondary schoolers (12 to 17)
2021 count
924
% of total
8.5%
Change from 2016
+1.1pp
924
8.5%
+1.1pp
Tertiary education and independence (18 to 24)
2021 count
909
% of total
8.4%
Change from 2016
-1.6pp
909
8.4%
-1.6pp
Young workforce (25 to 34)
2021 count
1,363
% of total
12.6%
Change from 2016
-1.3pp
1,363
12.6%
-1.3pp
Parents and homebuilders (35 to 49)
2021 count
2,058
% of total
19.0%
Change from 2016
-1.1pp
2,058
19.0%
-1.1pp
Older workers and pre-retirees (50 to 59)
2021 count
1,548
% of total
14.3%
Change from 2016
-0.1pp
1,548
14.3%
-0.1pp
Empty nesters and retirees (60 to 69)
2021 count
1,218
% of total
11.2%
Change from 2016
+2.1pp
1,218
11.2%
+2.1pp
Seniors (70 to 84)
2021 count
918
% of total
8.5%
Change from 2016
+1.5pp
918
8.5%
+1.5pp
Elderly aged (85 and over)
2021 count
141
% of total
1.3%
Change from 2016
+0.3pp
141
1.3%
+0.3pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-84
-0.8pp
Primary schoolers (5 to 11)
0
0.0pp
Secondary schoolers (12 to 17)
+130
+1.1pp
Tertiary education and independence (18 to 24)
-172
-1.6pp
Young workforce (25 to 34)
-137
-1.3pp
Parents and homebuilders (35 to 49)
-102
-1.1pp
Older workers and pre-retirees (50 to 59)
-8
-0.1pp
Empty nesters and retirees (60 to 69)
+241
+2.1pp
Seniors (70 to 84)
+167
+1.5pp
Elderly aged (85 and over)
+37
+0.3pp
Data table
Service age groups for Warnbro. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Rockingham (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Rockingham (C)% | Count | % | Rockingham (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 694 | 6.4% | 6.7% | 778 | 7.2% | 7.5% | -84 | -0.8pp |
| Primary schoolers (5 to 11) | 1,060 | 9.8% | 10.4% | 1,060 | 9.8% | 10.7% | 0 | 0.0pp |
| Secondary schoolers (12 to 17) | 924 | 8.5% | 8.6% | 794 | 7.4% | 8.1% | +130 | +1.1pp |
| Tertiary education and independence (18 to 24) | 909 | 8.4% | 8.4% | 1,081 | 10.0% | 9.3% | -172 | -1.6pp |
| Young workforce (25 to 34) | 1,363 | 12.6% | 13.5% | 1,500 | 13.9% | 14.6% | -137 | -1.3pp |
| Parents and homebuilders (35 to 49) | 2,058 | 19.0% | 20.1% | 2,160 | 20.1% | 20.8% | -102 | -1.1pp |
| Older workers and pre-retirees (50 to 59) | 1,548 | 14.3% | 12.8% | 1,556 | 14.4% | 12.1% | -8 | -0.1pp |
| Empty nesters and retirees (60 to 69) | 1,218 | 11.2% | 9.5% | 977 | 9.1% | 8.4% | +241 | +2.1pp |
| Seniors (70 to 84) | 918 | 8.5% | 8.3% | 751 | 7.0% | 7.0% | +167 | +1.5pp |
| Elderly aged (85 and over) | 141 | 1.3% | 1.5% | 104 | 1.0% | 1.4% | +37 | +0.3pp |
| Total | 10,828 | 100.0% | 100.0% | 10,769 | 100.0% | 100.0% | +59 | 0.0pp |