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 Port Arthur (Tas.), accounting for 18.2% (45 people). This share was lower than Tasman (M) (23.5%). Since 2016, the biggest change was in Seniors (70 to 84), which decreased by 19 people and 7.3 percentage points.
Section overview
Age structure - Service age groups
Port Arthur (Tas.) - Total persons (Usual residence)
This table summarises service age groups for Port Arthur (Tas.) in 2021 for persons, with comparison against Tasman (M) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Port Arthur (Tas.), with comparison markers for Tasman (M).
Babies and pre-schoolers (0 to 4)
2021 count
0
% of total
0.0%
Change from 2016
-1.2pp
0
0.0%
-1.2pp
Primary schoolers (5 to 11)
2021 count
6
% of total
2.4%
Change from 2016
-2.0pp
6
2.4%
-2.0pp
Secondary schoolers (12 to 17)
2021 count
18
% of total
7.3%
Change from 2016
+1.3pp
18
7.3%
+1.3pp
Tertiary education and independence (18 to 24)
2021 count
4
% of total
1.6%
Change from 2016
-1.2pp
4
1.6%
-1.2pp
Young workforce (25 to 34)
2021 count
26
% of total
10.5%
Change from 2016
+6.5pp
26
10.5%
+6.5pp
Parents and homebuilders (35 to 49)
2021 count
28
% of total
11.3%
Change from 2016
+0.5pp
28
11.3%
+0.5pp
Older workers and pre-retirees (50 to 59)
2021 count
27
% of total
10.9%
Change from 2016
-6.2pp
27
10.9%
-6.2pp
Empty nesters and retirees (60 to 69)
2021 count
45
% of total
18.2%
Change from 2016
-5.7pp
45
18.2%
-5.7pp
Seniors (70 to 84)
2021 count
45
% of total
18.2%
Change from 2016
-7.3pp
45
18.2%
-7.3pp
Elderly aged (85 and over)
2021 count
9
% of total
3.6%
Change from 2016
+1.6pp
9
3.6%
+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)
-3
-1.2pp
Primary schoolers (5 to 11)
-5
-2.0pp
Secondary schoolers (12 to 17)
+3
+1.3pp
Tertiary education and independence (18 to 24)
-3
-1.2pp
Young workforce (25 to 34)
+16
+6.5pp
Parents and homebuilders (35 to 49)
+1
+0.5pp
Older workers and pre-retirees (50 to 59)
-16
-6.2pp
Empty nesters and retirees (60 to 69)
-15
-5.7pp
Seniors (70 to 84)
-19
-7.3pp
Elderly aged (85 and over)
+4
+1.6pp
Data table
Service age groups for Port Arthur (Tas.). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Tasman (M).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Tasman (M)% | Count | % | Tasman (M)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 0 | 0.0% | 2.6% | 3 | 1.2% | 3.6% | -3 | -1.2pp |
| Primary schoolers (5 to 11) | 6 | 2.4% | 4.5% | 11 | 4.4% | 7.1% | -5 | -2.0pp |
| Secondary schoolers (12 to 17) | 18 | 7.3% | 5.8% | 15 | 6.0% | 5.4% | +3 | +1.3pp |
| Tertiary education and independence (18 to 24) | 4 | 1.6% | 4.0% | 7 | 2.8% | 3.5% | -3 | -1.2pp |
| Young workforce (25 to 34) | 26 | 10.5% | 6.7% | 10 | 4.0% | 6.2% | +16 | +6.5pp |
| Parents and homebuilders (35 to 49) | 28 | 11.3% | 15.0% | 27 | 10.8% | 15.4% | +1 | +0.5pp |
| Older workers and pre-retirees (50 to 59) | 27 | 10.9% | 16.5% | 43 | 17.1% | 19.2% | -16 | -6.2pp |
| Empty nesters and retirees (60 to 69) | 45 | 18.2% | 23.5% | 60 | 23.9% | 21.4% | -15 | -5.7pp |
| Seniors (70 to 84) | 45 | 18.2% | 18.8% | 64 | 25.5% | 16.2% | -19 | -7.3pp |
| Elderly aged (85 and over) | 9 | 3.6% | 2.4% | 5 | 2.0% | 2.6% | +4 | +1.6pp |
| Total | 247 | 100.0% | 100.0% | 251 | 100.0% | 100.0% | -4 | 0.0pp |