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 Seven Hills (Qld), accounting for 25.8% (704 people). This share was higher than Brisbane (C) (22.1%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 91 people, while its share fell by 1.9 percentage points.
Section overview
Age structure - Service age groups
Seven Hills (Qld) - Total persons (Usual residence)
This table summarises service age groups for Seven Hills (Qld) in 2021 for persons, with comparison against Brisbane (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Seven Hills (Qld), with comparison markers for Brisbane (C).
Babies and pre-schoolers (0 to 4)
2021 count
167
% of total
6.1%
Change from 2016
-1.4pp
167
6.1%
-1.4pp
Primary schoolers (5 to 11)
2021 count
299
% of total
10.9%
Change from 2016
-1.7pp
299
10.9%
-1.7pp
Secondary schoolers (12 to 17)
2021 count
269
% of total
9.8%
Change from 2016
+1.3pp
269
9.8%
+1.3pp
Tertiary education and independence (18 to 24)
2021 count
211
% of total
7.7%
Change from 2016
0.0pp
211
7.7%
0.0pp
Young workforce (25 to 34)
2021 count
299
% of total
10.9%
Change from 2016
-2.1pp
299
10.9%
-2.1pp
Parents and homebuilders (35 to 49)
2021 count
704
% of total
25.8%
Change from 2016
-1.9pp
704
25.8%
-1.9pp
Older workers and pre-retirees (50 to 59)
2021 count
331
% of total
12.1%
Change from 2016
+0.4pp
331
12.1%
+0.4pp
Empty nesters and retirees (60 to 69)
2021 count
210
% of total
7.7%
Change from 2016
+1.5pp
210
7.7%
+1.5pp
Seniors (70 to 84)
2021 count
169
% of total
6.2%
Change from 2016
+1.0pp
169
6.2%
+1.0pp
Elderly aged (85 and over)
2021 count
94
% of total
3.4%
Change from 2016
+1.9pp
94
3.4%
+1.9pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+1
-1.4pp
Primary schoolers (5 to 11)
+21
-1.7pp
Secondary schoolers (12 to 17)
+81
+1.3pp
Tertiary education and independence (18 to 24)
+40
0.0pp
Young workforce (25 to 34)
+11
-2.1pp
Parents and homebuilders (35 to 49)
+91
-1.9pp
Older workers and pre-retirees (50 to 59)
+73
+0.4pp
Empty nesters and retirees (60 to 69)
+72
+1.5pp
Seniors (70 to 84)
+54
+1.0pp
Elderly aged (85 and over)
+61
+1.9pp
Data table
Service age groups for Seven Hills (Qld). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Brisbane (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Brisbane (C)% | Count | % | Brisbane (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 167 | 6.1% | 5.5% | 166 | 7.5% | 6.0% | +1 | -1.4pp |
| Primary schoolers (5 to 11) | 299 | 10.9% | 8.4% | 278 | 12.6% | 8.3% | +21 | -1.7pp |
| Secondary schoolers (12 to 17) | 269 | 9.8% | 7.0% | 188 | 8.5% | 6.7% | +81 | +1.3pp |
| Tertiary education and independence (18 to 24) | 211 | 7.7% | 10.4% | 171 | 7.7% | 11.5% | +40 | 0.0pp |
| Young workforce (25 to 34) | 299 | 10.9% | 16.6% | 288 | 13.0% | 17.3% | +11 | -2.1pp |
| Parents and homebuilders (35 to 49) | 704 | 25.8% | 22.1% | 613 | 27.7% | 21.5% | +91 | -1.9pp |
| Older workers and pre-retirees (50 to 59) | 331 | 12.1% | 11.8% | 258 | 11.7% | 11.6% | +73 | +0.4pp |
| Empty nesters and retirees (60 to 69) | 210 | 7.7% | 8.8% | 138 | 6.2% | 8.6% | +72 | +1.5pp |
| Seniors (70 to 84) | 169 | 6.2% | 7.7% | 115 | 5.2% | 6.6% | +54 | +1.0pp |
| Elderly aged (85 and over) | 94 | 3.4% | 1.8% | 33 | 1.5% | 1.8% | +61 | +1.9pp |
| Total | 2,732 | 100.0% | 100.0% | 2,211 | 100.0% | 100.0% | +521 | 0.0pp |