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 Summer Hill (Inner West - NSW), accounting for 25% (1,820 people). This share was higher than Inner West (A) (24.2%). Since 2016, the biggest change was in Primary schoolers (5 to 11), which decreased by 145 people and 2 percentage points.
Section overview
Age structure - Service age groups
Summer Hill (Inner West - NSW) - Total persons (Usual residence)
This table summarises service age groups for Summer Hill (Inner West - NSW) in 2021 for persons, with comparison against Inner West (A) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Summer Hill (Inner West - NSW), with comparison markers for Inner West (A).
Babies and pre-schoolers (0 to 4)
2021 count
367
% of total
5.0%
Change from 2016
-0.6pp
367
5.0%
-0.6pp
Primary schoolers (5 to 11)
2021 count
425
% of total
5.8%
Change from 2016
-2.0pp
425
5.8%
-2.0pp
Secondary schoolers (12 to 17)
2021 count
370
% of total
5.1%
Change from 2016
+1.0pp
370
5.1%
+1.0pp
Tertiary education and independence (18 to 24)
2021 count
566
% of total
7.8%
Change from 2016
+0.1pp
566
7.8%
+0.1pp
Young workforce (25 to 34)
2021 count
1,646
% of total
22.6%
Change from 2016
+0.9pp
1,646
22.6%
+0.9pp
Parents and homebuilders (35 to 49)
2021 count
1,820
% of total
25.0%
Change from 2016
-0.4pp
1,820
25.0%
-0.4pp
Older workers and pre-retirees (50 to 59)
2021 count
869
% of total
11.9%
Change from 2016
-0.3pp
869
11.9%
-0.3pp
Empty nesters and retirees (60 to 69)
2021 count
617
% of total
8.5%
Change from 2016
+0.2pp
617
8.5%
+0.2pp
Seniors (70 to 84)
2021 count
480
% of total
6.6%
Change from 2016
+1.7pp
480
6.6%
+1.7pp
Elderly aged (85 and over)
2021 count
147
% of total
2.0%
Change from 2016
+0.2pp
147
2.0%
+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)
-45
-0.6pp
Primary schoolers (5 to 11)
-145
-2.0pp
Secondary schoolers (12 to 17)
+67
+1.0pp
Tertiary education and independence (18 to 24)
+2
+0.1pp
Young workforce (25 to 34)
+59
+0.9pp
Parents and homebuilders (35 to 49)
-36
-0.4pp
Older workers and pre-retirees (50 to 59)
-26
-0.3pp
Empty nesters and retirees (60 to 69)
+9
+0.2pp
Seniors (70 to 84)
+122
+1.7pp
Elderly aged (85 and over)
+13
+0.2pp
Data table
Service age groups for Summer Hill (Inner West - NSW). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Inner West (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Inner West (A)% | Count | % | Inner West (A)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 367 | 5.0% | 5.0% | 412 | 5.6% | 5.9% | -45 | -0.6pp |
| Primary schoolers (5 to 11) | 425 | 5.8% | 6.8% | 570 | 7.8% | 7.1% | -145 | -2.0pp |
| Secondary schoolers (12 to 17) | 370 | 5.1% | 5.3% | 303 | 4.1% | 4.6% | +67 | +1.0pp |
| Tertiary education and independence (18 to 24) | 566 | 7.8% | 7.8% | 564 | 7.7% | 8.5% | +2 | +0.1pp |
| Young workforce (25 to 34) | 1,646 | 22.6% | 19.3% | 1,587 | 21.7% | 20.3% | +59 | +0.9pp |
| Parents and homebuilders (35 to 49) | 1,820 | 25.0% | 24.2% | 1,856 | 25.4% | 24.8% | -36 | -0.4pp |
| Older workers and pre-retirees (50 to 59) | 869 | 11.9% | 12.7% | 895 | 12.2% | 12.0% | -26 | -0.3pp |
| Empty nesters and retirees (60 to 69) | 617 | 8.5% | 9.1% | 608 | 8.3% | 8.6% | +9 | +0.2pp |
| Seniors (70 to 84) | 480 | 6.6% | 7.9% | 358 | 4.9% | 6.6% | +122 | +1.7pp |
| Elderly aged (85 and over) | 147 | 2.0% | 2.0% | 134 | 1.8% | 1.7% | +13 | +0.2pp |
| Total | 7,288 | 100.0% | 100.0% | 7,311 | 100.0% | 100.0% | -23 | 0.0pp |