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 South Arm (Tas.), accounting for 21% (202 people). This share was higher than Clarence (C) (18.8%). Since 2016, the biggest change was in Parents and homebuilders (35 to 49), which increased by 50 people and 3.7 percentage points.
Section overview
Age structure - Service age groups
South Arm (Tas.) - Total persons (Usual residence)
This table summarises service age groups for South Arm (Tas.) in 2021 for persons, with comparison against Clarence (C) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for South Arm (Tas.), with comparison markers for Clarence (C).
Babies and pre-schoolers (0 to 4)
2021 count
44
% of total
4.6%
Change from 2016
-0.9pp
44
4.6%
-0.9pp
Primary schoolers (5 to 11)
2021 count
74
% of total
7.7%
Change from 2016
+2.2pp
74
7.7%
+2.2pp
Secondary schoolers (12 to 17)
2021 count
65
% of total
6.7%
Change from 2016
-1.8pp
65
6.7%
-1.8pp
Tertiary education and independence (18 to 24)
2021 count
38
% of total
3.9%
Change from 2016
-2.8pp
38
3.9%
-2.8pp
Young workforce (25 to 34)
2021 count
82
% of total
8.5%
Change from 2016
+0.3pp
82
8.5%
+0.3pp
Parents and homebuilders (35 to 49)
2021 count
202
% of total
21.0%
Change from 2016
+3.7pp
202
21.0%
+3.7pp
Older workers and pre-retirees (50 to 59)
2021 count
126
% of total
13.1%
Change from 2016
-3.5pp
126
13.1%
-3.5pp
Empty nesters and retirees (60 to 69)
2021 count
181
% of total
18.8%
Change from 2016
-1.1pp
181
18.8%
-1.1pp
Seniors (70 to 84)
2021 count
121
% of total
12.6%
Change from 2016
+3.6pp
121
12.6%
+3.6pp
Elderly aged (85 and over)
2021 count
24
% of total
2.5%
Change from 2016
+1.6pp
24
2.5%
+1.6pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-4
-0.9pp
Primary schoolers (5 to 11)
+26
+2.2pp
Secondary schoolers (12 to 17)
-10
-1.8pp
Tertiary education and independence (18 to 24)
-21
-2.8pp
Young workforce (25 to 34)
+10
+0.3pp
Parents and homebuilders (35 to 49)
+50
+3.7pp
Older workers and pre-retirees (50 to 59)
-20
-3.5pp
Empty nesters and retirees (60 to 69)
+6
-1.1pp
Seniors (70 to 84)
+42
+3.6pp
Elderly aged (85 and over)
+16
+1.6pp
Data table
Service age groups for South Arm (Tas.). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Clarence (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Clarence (C)% | Count | % | Clarence (C)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 44 | 4.6% | 5.4% | 48 | 5.5% | 5.8% | -4 | -0.9pp |
| Primary schoolers (5 to 11) | 74 | 7.7% | 8.1% | 48 | 5.5% | 8.8% | +26 | +2.2pp |
| Secondary schoolers (12 to 17) | 65 | 6.7% | 6.8% | 75 | 8.5% | 6.9% | -10 | -1.8pp |
| Tertiary education and independence (18 to 24) | 38 | 3.9% | 7.2% | 59 | 6.7% | 7.4% | -21 | -2.8pp |
| Young workforce (25 to 34) | 82 | 8.5% | 14.0% | 72 | 8.2% | 11.3% | +10 | +0.3pp |
| Parents and homebuilders (35 to 49) | 202 | 21.0% | 18.8% | 152 | 17.3% | 19.1% | +50 | +3.7pp |
| Older workers and pre-retirees (50 to 59) | 126 | 13.1% | 12.1% | 146 | 16.6% | 14.1% | -20 | -3.5pp |
| Empty nesters and retirees (60 to 69) | 181 | 18.8% | 12.5% | 175 | 19.9% | 12.9% | +6 | -1.1pp |
| Seniors (70 to 84) | 121 | 12.6% | 12.3% | 79 | 9.0% | 11.0% | +42 | +3.6pp |
| Elderly aged (85 and over) | 24 | 2.5% | 2.7% | 8 | 0.9% | 2.7% | +16 | +1.6pp |
| Total | 963 | 100.0% | 100.0% | 880 | 100.0% | 100.0% | +83 | 0.0pp |