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 Dean Park, accounting for 19.6% (624 people). This share was lower than Blacktown (C) (23.4%). Since 2016, the biggest change was in Empty nesters and retirees (60 to 69), which increased by 66 people and 2.2 percentage points.
Section overview
Age structure - Service age groups
Dean Park - Total persons (Usual residence)
This table summarises service age groups for Dean Park in 2021 for persons, with comparison against Blacktown (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Dean Park, with comparison markers for Blacktown (C).
Babies and pre-schoolers (0 to 4)
2021 count
225
% of total
7.1%
Change from 2016
-1.0pp
225
7.1%
-1.0pp
Primary schoolers (5 to 11)
2021 count
295
% of total
9.3%
Change from 2016
-1.1pp
295
9.3%
-1.1pp
Secondary schoolers (12 to 17)
2021 count
235
% of total
7.4%
Change from 2016
-1.2pp
235
7.4%
-1.2pp
Tertiary education and independence (18 to 24)
2021 count
279
% of total
8.8%
Change from 2016
-0.9pp
279
8.8%
-0.9pp
Young workforce (25 to 34)
2021 count
512
% of total
16.1%
Change from 2016
+1.9pp
512
16.1%
+1.9pp
Parents and homebuilders (35 to 49)
2021 count
624
% of total
19.6%
Change from 2016
-0.9pp
624
19.6%
-0.9pp
Older workers and pre-retirees (50 to 59)
2021 count
394
% of total
12.4%
Change from 2016
-0.1pp
394
12.4%
-0.1pp
Empty nesters and retirees (60 to 69)
2021 count
324
% of total
10.2%
Change from 2016
+2.2pp
324
10.2%
+2.2pp
Seniors (70 to 84)
2021 count
216
% of total
6.8%
Change from 2016
+1.7pp
216
6.8%
+1.7pp
Elderly aged (85 and over)
2021 count
89
% of total
2.8%
Change from 2016
+0.2pp
89
2.8%
+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)
-36
-1.0pp
Primary schoolers (5 to 11)
-39
-1.1pp
Secondary schoolers (12 to 17)
-43
-1.2pp
Tertiary education and independence (18 to 24)
-35
-0.9pp
Young workforce (25 to 34)
+55
+1.9pp
Parents and homebuilders (35 to 49)
-38
-0.9pp
Older workers and pre-retirees (50 to 59)
-9
-0.1pp
Empty nesters and retirees (60 to 69)
+66
+2.2pp
Seniors (70 to 84)
+51
+1.7pp
Elderly aged (85 and over)
+5
+0.2pp
Data table
Service age groups for Dean Park. 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) | 225 | 7.1% | 7.5% | 261 | 8.1% | 8.0% | -36 | -1.0pp |
| Primary schoolers (5 to 11) | 295 | 9.3% | 10.9% | 334 | 10.4% | 10.8% | -39 | -1.1pp |
| Secondary schoolers (12 to 17) | 235 | 7.4% | 8.0% | 278 | 8.6% | 8.2% | -43 | -1.2pp |
| Tertiary education and independence (18 to 24) | 279 | 8.8% | 9.1% | 314 | 9.7% | 9.5% | -35 | -0.9pp |
| Young workforce (25 to 34) | 512 | 16.1% | 14.9% | 457 | 14.2% | 15.5% | +55 | +1.9pp |
| Parents and homebuilders (35 to 49) | 624 | 19.6% | 23.4% | 662 | 20.5% | 21.7% | -38 | -0.9pp |
| Older workers and pre-retirees (50 to 59) | 394 | 12.4% | 10.7% | 403 | 12.5% | 11.4% | -9 | -0.1pp |
| Empty nesters and retirees (60 to 69) | 324 | 10.2% | 8.2% | 258 | 8.0% | 8.4% | +66 | +2.2pp |
| Seniors (70 to 84) | 216 | 6.8% | 6.2% | 165 | 5.1% | 5.4% | +51 | +1.7pp |
| Elderly aged (85 and over) | 89 | 2.8% | 1.1% | 84 | 2.6% | 1.1% | +5 | +0.2pp |
| Total | 3,180 | 100.0% | 100.0% | 3,227 | 100.0% | 100.0% | -47 | 0.0pp |