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 Sinclair, accounting for 15.8% (121 people). This share was lower than Esperance (S) (18.4%). Since 2016, the biggest change was in Secondary schoolers (12 to 17), which decreased by 74 people and 7.5 percentage points.
Section overview
Age structure - Service age groups
Sinclair - Total persons (Usual residence)
This table summarises service age groups for Sinclair in 2021 for persons, with comparison against Esperance (S) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Sinclair, with comparison markers for Esperance (S).
Babies and pre-schoolers (0 to 4)
2021 count
48
% of total
6.3%
Change from 2016
+1.4pp
48
6.3%
+1.4pp
Primary schoolers (5 to 11)
2021 count
62
% of total
8.1%
Change from 2016
-2.8pp
62
8.1%
-2.8pp
Secondary schoolers (12 to 17)
2021 count
88
% of total
11.5%
Change from 2016
-7.5pp
88
11.5%
-7.5pp
Tertiary education and independence (18 to 24)
2021 count
70
% of total
9.2%
Change from 2016
+2.7pp
70
9.2%
+2.7pp
Young workforce (25 to 34)
2021 count
93
% of total
12.2%
Change from 2016
+1.2pp
93
12.2%
+1.2pp
Parents and homebuilders (35 to 49)
2021 count
121
% of total
15.8%
Change from 2016
-4.0pp
121
15.8%
-4.0pp
Older workers and pre-retirees (50 to 59)
2021 count
101
% of total
13.2%
Change from 2016
+2.4pp
101
13.2%
+2.4pp
Empty nesters and retirees (60 to 69)
2021 count
92
% of total
12.0%
Change from 2016
+3.8pp
92
12.0%
+3.8pp
Seniors (70 to 84)
2021 count
75
% of total
9.8%
Change from 2016
+2.6pp
75
9.8%
+2.6pp
Elderly aged (85 and over)
2021 count
4
% of total
0.5%
Change from 2016
+0.5pp
4
0.5%
+0.5pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
+6
+1.4pp
Primary schoolers (5 to 11)
-31
-2.8pp
Secondary schoolers (12 to 17)
-74
-7.5pp
Tertiary education and independence (18 to 24)
+15
+2.7pp
Young workforce (25 to 34)
-1
+1.2pp
Parents and homebuilders (35 to 49)
-48
-4.0pp
Older workers and pre-retirees (50 to 59)
+9
+2.4pp
Empty nesters and retirees (60 to 69)
+22
+3.8pp
Seniors (70 to 84)
+14
+2.6pp
Elderly aged (85 and over)
+4
+0.5pp
Data table
Service age groups for Sinclair. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Esperance (S).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Esperance (S)% | Count | % | Esperance (S)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 48 | 6.3% | 5.9% | 42 | 4.9% | 6.4% | +6 | +1.4pp |
| Primary schoolers (5 to 11) | 62 | 8.1% | 9.4% | 93 | 10.9% | 9.8% | -31 | -2.8pp |
| Secondary schoolers (12 to 17) | 88 | 11.5% | 8.3% | 162 | 19.0% | 9.1% | -74 | -7.5pp |
| Tertiary education and independence (18 to 24) | 70 | 9.2% | 6.7% | 55 | 6.5% | 7.3% | +15 | +2.7pp |
| Young workforce (25 to 34) | 93 | 12.2% | 11.2% | 94 | 11.0% | 11.4% | -1 | +1.2pp |
| Parents and homebuilders (35 to 49) | 121 | 15.8% | 18.4% | 169 | 19.8% | 19.3% | -48 | -4.0pp |
| Older workers and pre-retirees (50 to 59) | 101 | 13.2% | 14.1% | 92 | 10.8% | 14.5% | +9 | +2.4pp |
| Empty nesters and retirees (60 to 69) | 92 | 12.0% | 12.1% | 70 | 8.2% | 11.1% | +22 | +3.8pp |
| Seniors (70 to 84) | 75 | 9.8% | 11.9% | 61 | 7.2% | 9.2% | +14 | +2.6pp |
| Elderly aged (85 and over) | 4 | 0.5% | 2.1% | 0 | 0.0% | 1.9% | +4 | +0.5pp |
| Total | 765 | 100.0% | 100.0% | 851 | 100.0% | 100.0% | -86 | 0.0pp |