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 Mitchells Island, accounting for 24% (111 people). This share was higher than Mid-Coast (A) (17.9%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which decreased by 42 people and 8.8 percentage points.
Section overview
Age structure - Service age groups
Mitchells Island - Total persons (Usual residence)
This table summarises service age groups for Mitchells Island in 2021 for persons, with comparison against Mid-Coast (A) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Mitchells Island, with comparison markers for Mid-Coast (A).
Babies and pre-schoolers (0 to 4)
2021 count
9
% of total
1.9%
Change from 2016
-0.7pp
9
1.9%
-0.7pp
Primary schoolers (5 to 11)
2021 count
43
% of total
9.3%
Change from 2016
+2.5pp
43
9.3%
+2.5pp
Secondary schoolers (12 to 17)
2021 count
34
% of total
7.4%
Change from 2016
-1.4pp
34
7.4%
-1.4pp
Tertiary education and independence (18 to 24)
2021 count
15
% of total
3.2%
Change from 2016
-1.1pp
15
3.2%
-1.1pp
Young workforce (25 to 34)
2021 count
14
% of total
3.0%
Change from 2016
+0.2pp
14
3.0%
+0.2pp
Parents and homebuilders (35 to 49)
2021 count
65
% of total
14.1%
Change from 2016
-8.8pp
65
14.1%
-8.8pp
Older workers and pre-retirees (50 to 59)
2021 count
72
% of total
15.6%
Change from 2016
+0.9pp
72
15.6%
+0.9pp
Empty nesters and retirees (60 to 69)
2021 count
111
% of total
24.0%
Change from 2016
+0.9pp
111
24.0%
+0.9pp
Seniors (70 to 84)
2021 count
73
% of total
15.8%
Change from 2016
+3.2pp
73
15.8%
+3.2pp
Elderly aged (85 and over)
2021 count
16
% of total
3.5%
Change from 2016
+2.2pp
16
3.5%
+2.2pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-3
-0.7pp
Primary schoolers (5 to 11)
+11
+2.5pp
Secondary schoolers (12 to 17)
-7
-1.4pp
Tertiary education and independence (18 to 24)
-5
-1.1pp
Young workforce (25 to 34)
+1
+0.2pp
Parents and homebuilders (35 to 49)
-42
-8.8pp
Older workers and pre-retirees (50 to 59)
+3
+0.9pp
Empty nesters and retirees (60 to 69)
+3
+0.9pp
Seniors (70 to 84)
+14
+3.2pp
Elderly aged (85 and over)
+10
+2.2pp
Data table
Service age groups for Mitchells Island. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Mid-Coast (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mid-Coast (A)% | Count | % | Mid-Coast (A)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 9 | 1.9% | 4.1% | 12 | 2.6% | 4.6% | -3 | -0.7pp |
| Primary schoolers (5 to 11) | 43 | 9.3% | 7.1% | 32 | 6.8% | 7.6% | +11 | +2.5pp |
| Secondary schoolers (12 to 17) | 34 | 7.4% | 6.5% | 41 | 8.8% | 6.8% | -7 | -1.4pp |
| Tertiary education and independence (18 to 24) | 15 | 3.2% | 5.3% | 20 | 4.3% | 5.6% | -5 | -1.1pp |
| Young workforce (25 to 34) | 14 | 3.0% | 7.9% | 13 | 2.8% | 7.4% | +1 | +0.2pp |
| Parents and homebuilders (35 to 49) | 65 | 14.1% | 14.0% | 107 | 22.9% | 15.0% | -42 | -8.8pp |
| Older workers and pre-retirees (50 to 59) | 72 | 15.6% | 13.2% | 69 | 14.7% | 14.5% | +3 | +0.9pp |
| Empty nesters and retirees (60 to 69) | 111 | 24.0% | 17.9% | 108 | 23.1% | 17.7% | +3 | +0.9pp |
| Seniors (70 to 84) | 73 | 15.8% | 20.1% | 59 | 12.6% | 17.0% | +14 | +3.2pp |
| Elderly aged (85 and over) | 16 | 3.5% | 4.0% | 6 | 1.3% | 3.8% | +10 | +2.2pp |
| Total | 462 | 100.0% | 100.0% | 468 | 100.0% | 100.0% | -6 | 0.0pp |