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, Young workforce (25 to 34) was the most common category among residents in Gregory Hills, accounting for 24.2% (2,212 people). This share was higher than Camden (A) (16.3%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 1,390 people and 2.1 percentage points.
Section overview
Age structure - Service age groups
Gregory Hills - Total persons (Usual residence)
This table summarises service age groups for Gregory Hills in 2021 for persons, with comparison against Camden (A) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Gregory Hills, with comparison markers for Camden (A).
Babies and pre-schoolers (0 to 4)
2021 count
1,197
% of total
13.1%
Change from 2016
+0.5pp
1,197
13.1%
+0.5pp
Primary schoolers (5 to 11)
2021 count
1,053
% of total
11.5%
Change from 2016
+1.7pp
1,053
11.5%
+1.7pp
Secondary schoolers (12 to 17)
2021 count
635
% of total
6.9%
Change from 2016
-0.9pp
635
6.9%
-0.9pp
Tertiary education and independence (18 to 24)
2021 count
661
% of total
7.2%
Change from 2016
-0.9pp
661
7.2%
-0.9pp
Young workforce (25 to 34)
2021 count
2,212
% of total
24.2%
Change from 2016
-1.7pp
2,212
24.2%
-1.7pp
Parents and homebuilders (35 to 49)
2021 count
2,060
% of total
22.5%
Change from 2016
+2.1pp
2,060
22.5%
+2.1pp
Older workers and pre-retirees (50 to 59)
2021 count
634
% of total
6.9%
Change from 2016
-1.1pp
634
6.9%
-1.1pp
Empty nesters and retirees (60 to 69)
2021 count
440
% of total
4.8%
Change from 2016
-0.4pp
440
4.8%
-0.4pp
Seniors (70 to 84)
2021 count
193
% of total
2.1%
Change from 2016
+0.4pp
193
2.1%
+0.4pp
Elderly aged (85 and over)
2021 count
29
% of total
0.3%
Change from 2016
+0.1pp
29
0.3%
+0.1pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+783
+0.5pp
Primary schoolers (5 to 11)
+730
+1.7pp
Secondary schoolers (12 to 17)
+379
-0.9pp
Tertiary education and independence (18 to 24)
+396
-0.9pp
Young workforce (25 to 34)
+1,360
-1.7pp
Parents and homebuilders (35 to 49)
+1,390
+2.1pp
Older workers and pre-retirees (50 to 59)
+370
-1.1pp
Empty nesters and retirees (60 to 69)
+271
-0.4pp
Seniors (70 to 84)
+136
+0.4pp
Elderly aged (85 and over)
+22
+0.1pp
Data table
Service age groups for Gregory Hills. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Camden (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Camden (A)% | Count | % | Camden (A)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 1,197 | 13.1% | 9.4% | 414 | 12.6% | 8.4% | +783 | +0.5pp |
| Primary schoolers (5 to 11) | 1,053 | 11.5% | 11.4% | 323 | 9.8% | 11.1% | +730 | +1.7pp |
| Secondary schoolers (12 to 17) | 635 | 6.9% | 8.3% | 256 | 7.8% | 8.6% | +379 | -0.9pp |
| Tertiary education and independence (18 to 24) | 661 | 7.2% | 8.3% | 265 | 8.1% | 8.9% | +396 | -0.9pp |
| Young workforce (25 to 34) | 2,212 | 24.2% | 16.3% | 852 | 25.9% | 15.2% | +1,360 | -1.7pp |
| Parents and homebuilders (35 to 49) | 2,060 | 22.5% | 22.4% | 670 | 20.4% | 22.0% | +1,390 | +2.1pp |
| Older workers and pre-retirees (50 to 59) | 634 | 6.9% | 10.0% | 264 | 8.0% | 10.9% | +370 | -1.1pp |
| Empty nesters and retirees (60 to 69) | 440 | 4.8% | 7.3% | 169 | 5.2% | 8.2% | +271 | -0.4pp |
| Seniors (70 to 84) | 193 | 2.1% | 5.6% | 57 | 1.7% | 5.5% | +136 | +0.4pp |
| Elderly aged (85 and over) | 29 | 0.3% | 1.0% | 7 | 0.2% | 1.2% | +22 | +0.1pp |
| Total | 9,142 | 100.0% | 100.0% | 3,285 | 100.0% | 100.0% | +5,857 | 0.0pp |