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, Empty nesters and retirees (60 to 69) was the most common category among residents in Coimadai, accounting for 21% (86 people). This share was higher than Moorabool (S) (11.3%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 27 people and 6.7 percentage points.
Section overview
Age structure - Service age groups
Coimadai - Total persons (Usual residence)
This table summarises service age groups for Coimadai in 2021 for persons, with comparison against Moorabool (S) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Coimadai, with comparison markers for Moorabool (S).
Babies and pre-schoolers (0 to 4)
2021 count
6
% of total
1.5%
Change from 2016
-2.3pp
6
1.5%
-2.3pp
Primary schoolers (5 to 11)
2021 count
37
% of total
9.0%
Change from 2016
-1.8pp
37
9.0%
-1.8pp
Secondary schoolers (12 to 17)
2021 count
42
% of total
10.3%
Change from 2016
+3.8pp
42
10.3%
+3.8pp
Tertiary education and independence (18 to 24)
2021 count
31
% of total
7.6%
Change from 2016
-1.3pp
31
7.6%
-1.3pp
Young workforce (25 to 34)
2021 count
17
% of total
4.2%
Change from 2016
-4.2pp
17
4.2%
-4.2pp
Parents and homebuilders (35 to 49)
2021 count
78
% of total
19.1%
Change from 2016
-2.8pp
78
19.1%
-2.8pp
Older workers and pre-retirees (50 to 59)
2021 count
74
% of total
18.1%
Change from 2016
+2.7pp
74
18.1%
+2.7pp
Empty nesters and retirees (60 to 69)
2021 count
86
% of total
21.0%
Change from 2016
+6.6pp
86
21.0%
+6.6pp
Seniors (70 to 84)
2021 count
53
% of total
13.0%
Change from 2016
+6.7pp
53
13.0%
+6.7pp
Elderly aged (85 and over)
2021 count
6
% of total
1.5%
Change from 2016
-0.4pp
6
1.5%
-0.4pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-10
-2.3pp
Primary schoolers (5 to 11)
-8
-1.8pp
Secondary schoolers (12 to 17)
+15
+3.8pp
Tertiary education and independence (18 to 24)
-6
-1.3pp
Young workforce (25 to 34)
-18
-4.2pp
Parents and homebuilders (35 to 49)
-13
-2.8pp
Older workers and pre-retirees (50 to 59)
+10
+2.7pp
Empty nesters and retirees (60 to 69)
+26
+6.6pp
Seniors (70 to 84)
+27
+6.7pp
Elderly aged (85 and over)
-2
-0.4pp
Data table
Service age groups for Coimadai. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Moorabool (S).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Moorabool (S)% | Count | % | Moorabool (S)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 6 | 1.5% | 6.3% | 16 | 3.8% | 6.4% | -10 | -2.3pp |
| Primary schoolers (5 to 11) | 37 | 9.0% | 9.6% | 45 | 10.8% | 10.0% | -8 | -1.8pp |
| Secondary schoolers (12 to 17) | 42 | 10.3% | 7.8% | 27 | 6.5% | 7.9% | +15 | +3.8pp |
| Tertiary education and independence (18 to 24) | 31 | 7.6% | 7.2% | 37 | 8.9% | 7.9% | -6 | -1.3pp |
| Young workforce (25 to 34) | 17 | 4.2% | 12.7% | 35 | 8.4% | 11.0% | -18 | -4.2pp |
| Parents and homebuilders (35 to 49) | 78 | 19.1% | 20.2% | 91 | 21.9% | 20.9% | -13 | -2.8pp |
| Older workers and pre-retirees (50 to 59) | 74 | 18.1% | 13.3% | 64 | 15.4% | 14.2% | +10 | +2.7pp |
| Empty nesters and retirees (60 to 69) | 86 | 21.0% | 11.3% | 60 | 14.4% | 12.0% | +26 | +6.6pp |
| Seniors (70 to 84) | 53 | 13.0% | 10.0% | 26 | 6.3% | 8.2% | +27 | +6.7pp |
| Elderly aged (85 and over) | 6 | 1.5% | 1.7% | 8 | 1.9% | 1.5% | -2 | -0.4pp |
| Total | 409 | 100.0% | 100.0% | 416 | 100.0% | 100.0% | -7 | 0.0pp |