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 Colebee, accounting for 27.2% (1,337 people). This share was higher than Blacktown (C) (23.4%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 807 people, while its share fell by 0.2 percentage points.
Section overview
Age structure - Service age groups
Colebee - Total persons (Usual residence)
This table summarises service age groups for Colebee in 2021 for persons, with comparison against Blacktown (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Colebee, with comparison markers for Blacktown (C).
Babies and pre-schoolers (0 to 4)
2021 count
442
% of total
9.0%
Change from 2016
-0.5pp
442
9.0%
-0.5pp
Primary schoolers (5 to 11)
2021 count
617
% of total
12.6%
Change from 2016
+0.7pp
617
12.6%
+0.7pp
Secondary schoolers (12 to 17)
2021 count
452
% of total
9.2%
Change from 2016
+0.5pp
452
9.2%
+0.5pp
Tertiary education and independence (18 to 24)
2021 count
431
% of total
8.8%
Change from 2016
+1.5pp
431
8.8%
+1.5pp
Young workforce (25 to 34)
2021 count
686
% of total
14.0%
Change from 2016
-4.2pp
686
14.0%
-4.2pp
Parents and homebuilders (35 to 49)
2021 count
1,337
% of total
27.2%
Change from 2016
-0.2pp
1,337
27.2%
-0.2pp
Older workers and pre-retirees (50 to 59)
2021 count
512
% of total
10.4%
Change from 2016
+0.1pp
512
10.4%
+0.1pp
Empty nesters and retirees (60 to 69)
2021 count
295
% of total
6.0%
Change from 2016
+0.4pp
295
6.0%
+0.4pp
Seniors (70 to 84)
2021 count
144
% of total
2.9%
Change from 2016
+1.4pp
144
2.9%
+1.4pp
Elderly aged (85 and over)
2021 count
18
% of total
0.4%
Change from 2016
+0.2pp
18
0.4%
+0.2pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+258
-0.5pp
Primary schoolers (5 to 11)
+388
+0.7pp
Secondary schoolers (12 to 17)
+284
+0.5pp
Tertiary education and independence (18 to 24)
+291
+1.5pp
Young workforce (25 to 34)
+334
-4.2pp
Parents and homebuilders (35 to 49)
+807
-0.2pp
Older workers and pre-retirees (50 to 59)
+313
+0.1pp
Empty nesters and retirees (60 to 69)
+186
+0.4pp
Seniors (70 to 84)
+115
+1.4pp
Elderly aged (85 and over)
+15
+0.2pp
Data table
Service age groups for Colebee. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Blacktown (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Blacktown (C)% | Count | % | Blacktown (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 442 | 9.0% | 7.5% | 184 | 9.5% | 8.0% | +258 | -0.5pp |
| Primary schoolers (5 to 11) | 617 | 12.6% | 10.9% | 229 | 11.9% | 10.8% | +388 | +0.7pp |
| Secondary schoolers (12 to 17) | 452 | 9.2% | 8.0% | 168 | 8.7% | 8.2% | +284 | +0.5pp |
| Tertiary education and independence (18 to 24) | 431 | 8.8% | 9.1% | 140 | 7.3% | 9.5% | +291 | +1.5pp |
| Young workforce (25 to 34) | 686 | 14.0% | 14.9% | 352 | 18.2% | 15.5% | +334 | -4.2pp |
| Parents and homebuilders (35 to 49) | 1,337 | 27.2% | 23.4% | 530 | 27.4% | 21.7% | +807 | -0.2pp |
| Older workers and pre-retirees (50 to 59) | 512 | 10.4% | 10.7% | 199 | 10.3% | 11.4% | +313 | +0.1pp |
| Empty nesters and retirees (60 to 69) | 295 | 6.0% | 8.2% | 109 | 5.6% | 8.4% | +186 | +0.4pp |
| Seniors (70 to 84) | 144 | 2.9% | 6.2% | 29 | 1.5% | 5.4% | +115 | +1.4pp |
| Elderly aged (85 and over) | 18 | 0.4% | 1.1% | 3 | 0.2% | 1.1% | +15 | +0.2pp |
| Total | 4,914 | 100.0% | 100.0% | 1,931 | 100.0% | 100.0% | +2,983 | 0.0pp |