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 St Peters (NSW) (part), accounting for 29.7% (1,079 people). This share was higher than Inner West (A) (24.2%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 235 people and 2.9 percentage points.
Section overview
Age structure - Service age groups
St Peters (NSW) (part) - Total persons (Usual residence)
This table summarises service age groups for St Peters (NSW) (part) 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 St Peters (NSW) (part), with comparison markers for Inner West (A).
Babies and pre-schoolers (0 to 4)
2021 count
216
% of total
6.0%
Change from 2016
+0.2pp
216
6.0%
+0.2pp
Primary schoolers (5 to 11)
2021 count
212
% of total
5.8%
Change from 2016
+0.9pp
212
5.8%
+0.9pp
Secondary schoolers (12 to 17)
2021 count
118
% of total
3.3%
Change from 2016
+0.5pp
118
3.3%
+0.5pp
Tertiary education and independence (18 to 24)
2021 count
221
% of total
6.1%
Change from 2016
-3.4pp
221
6.1%
-3.4pp
Young workforce (25 to 34)
2021 count
1,059
% of total
29.2%
Change from 2016
-0.2pp
1,059
29.2%
-0.2pp
Parents and homebuilders (35 to 49)
2021 count
1,079
% of total
29.7%
Change from 2016
+2.9pp
1,079
29.7%
+2.9pp
Older workers and pre-retirees (50 to 59)
2021 count
358
% of total
9.9%
Change from 2016
-0.3pp
358
9.9%
-0.3pp
Empty nesters and retirees (60 to 69)
2021 count
222
% of total
6.1%
Change from 2016
-0.1pp
222
6.1%
-0.1pp
Seniors (70 to 84)
2021 count
128
% of total
3.5%
Change from 2016
+0.1pp
128
3.5%
+0.1pp
Elderly aged (85 and over)
2021 count
41
% of total
1.1%
Change from 2016
0.0pp
41
1.1%
0.0pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+35
+0.2pp
Primary schoolers (5 to 11)
+57
+0.9pp
Secondary schoolers (12 to 17)
+29
+0.5pp
Tertiary education and independence (18 to 24)
-78
-3.4pp
Young workforce (25 to 34)
+135
-0.2pp
Parents and homebuilders (35 to 49)
+235
+2.9pp
Older workers and pre-retirees (50 to 59)
+38
-0.3pp
Empty nesters and retirees (60 to 69)
+26
-0.1pp
Seniors (70 to 84)
+22
+0.1pp
Elderly aged (85 and over)
+5
0.0pp
Data table
Service age groups for St Peters (NSW) (part). 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) | 216 | 6.0% | 5.0% | 181 | 5.8% | 5.9% | +35 | +0.2pp |
| Primary schoolers (5 to 11) | 212 | 5.8% | 6.8% | 155 | 4.9% | 7.1% | +57 | +0.9pp |
| Secondary schoolers (12 to 17) | 118 | 3.3% | 5.3% | 89 | 2.8% | 4.6% | +29 | +0.5pp |
| Tertiary education and independence (18 to 24) | 221 | 6.1% | 7.8% | 299 | 9.5% | 8.5% | -78 | -3.4pp |
| Young workforce (25 to 34) | 1,059 | 29.2% | 19.3% | 924 | 29.4% | 20.3% | +135 | -0.2pp |
| Parents and homebuilders (35 to 49) | 1,079 | 29.7% | 24.2% | 844 | 26.8% | 24.8% | +235 | +2.9pp |
| Older workers and pre-retirees (50 to 59) | 358 | 9.9% | 12.7% | 320 | 10.2% | 12.0% | +38 | -0.3pp |
| Empty nesters and retirees (60 to 69) | 222 | 6.1% | 9.1% | 196 | 6.2% | 8.6% | +26 | -0.1pp |
| Seniors (70 to 84) | 128 | 3.5% | 7.9% | 106 | 3.4% | 6.6% | +22 | +0.1pp |
| Elderly aged (85 and over) | 41 | 1.1% | 2.0% | 36 | 1.1% | 1.7% | +5 | 0.0pp |
| Total | 3,629 | 100.0% | 100.0% | 3,145 | 100.0% | 100.0% | +484 | 0.0pp |