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 Hassall Grove, accounting for 19.1% (839 people). This share was lower than Blacktown (C) (23.4%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which decreased by 137 people and 2.6 percentage points.
Section overview
Age structure - Service age groups
Hassall Grove - Total persons (Usual residence)
This table summarises service age groups for Hassall Grove in 2021 for persons, with comparison against Blacktown (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Hassall Grove, with comparison markers for Blacktown (C).
Babies and pre-schoolers (0 to 4)
2021 count
339
% of total
7.7%
Change from 2016
+1.1pp
339
7.7%
+1.1pp
Primary schoolers (5 to 11)
2021 count
472
% of total
10.7%
Change from 2016
-1.3pp
472
10.7%
-1.3pp
Secondary schoolers (12 to 17)
2021 count
394
% of total
9.0%
Change from 2016
-2.0pp
394
9.0%
-2.0pp
Tertiary education and independence (18 to 24)
2021 count
529
% of total
12.0%
Change from 2016
-0.7pp
529
12.0%
-0.7pp
Young workforce (25 to 34)
2021 count
628
% of total
14.3%
Change from 2016
+1.1pp
628
14.3%
+1.1pp
Parents and homebuilders (35 to 49)
2021 count
839
% of total
19.1%
Change from 2016
-2.6pp
839
19.1%
-2.6pp
Older workers and pre-retirees (50 to 59)
2021 count
617
% of total
14.0%
Change from 2016
+1.2pp
617
14.0%
+1.2pp
Empty nesters and retirees (60 to 69)
2021 count
397
% of total
9.0%
Change from 2016
+2.3pp
397
9.0%
+2.3pp
Seniors (70 to 84)
2021 count
179
% of total
4.1%
Change from 2016
+1.4pp
179
4.1%
+1.4pp
Elderly aged (85 and over)
2021 count
19
% of total
0.4%
Change from 2016
-0.2pp
19
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)
+40
+1.1pp
Primary schoolers (5 to 11)
-68
-1.3pp
Secondary schoolers (12 to 17)
-101
-2.0pp
Tertiary education and independence (18 to 24)
-45
-0.7pp
Young workforce (25 to 34)
+33
+1.1pp
Parents and homebuilders (35 to 49)
-137
-2.6pp
Older workers and pre-retirees (50 to 59)
+39
+1.2pp
Empty nesters and retirees (60 to 69)
+94
+2.3pp
Seniors (70 to 84)
+59
+1.4pp
Elderly aged (85 and over)
-8
-0.2pp
Data table
Service age groups for Hassall Grove. 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) | 339 | 7.7% | 7.5% | 299 | 6.6% | 8.0% | +40 | +1.1pp |
| Primary schoolers (5 to 11) | 472 | 10.7% | 10.9% | 540 | 12.0% | 10.8% | -68 | -1.3pp |
| Secondary schoolers (12 to 17) | 394 | 9.0% | 8.0% | 495 | 11.0% | 8.2% | -101 | -2.0pp |
| Tertiary education and independence (18 to 24) | 529 | 12.0% | 9.1% | 574 | 12.7% | 9.5% | -45 | -0.7pp |
| Young workforce (25 to 34) | 628 | 14.3% | 14.9% | 595 | 13.2% | 15.5% | +33 | +1.1pp |
| Parents and homebuilders (35 to 49) | 839 | 19.1% | 23.4% | 976 | 21.7% | 21.7% | -137 | -2.6pp |
| Older workers and pre-retirees (50 to 59) | 617 | 14.0% | 10.7% | 578 | 12.8% | 11.4% | +39 | +1.2pp |
| Empty nesters and retirees (60 to 69) | 397 | 9.0% | 8.2% | 303 | 6.7% | 8.4% | +94 | +2.3pp |
| Seniors (70 to 84) | 179 | 4.1% | 6.2% | 120 | 2.7% | 5.4% | +59 | +1.4pp |
| Elderly aged (85 and over) | 19 | 0.4% | 1.1% | 27 | 0.6% | 1.1% | -8 | -0.2pp |
| Total | 4,401 | 100.0% | 100.0% | 4,505 | 100.0% | 100.0% | -104 | 0.0pp |