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 West Arnhem (R), accounting for 20.7% (1,300 people). This share was similar to Regional NT (20.8%). Since 2016, the biggest change was in Babies and pre-schoolers (0 to 4), which decreased by 175 people and 3 percentage points.
Section overview
Age structure - Service age groups
West Arnhem (R) - Total persons (Usual residence)
This table summarises service age groups for West Arnhem (R) in 2021 for persons, with comparison against Regional NT and change since 2016.
Chart view
Age structure - Service age groups snapshot
2021 distribution by category for West Arnhem (R), with comparison markers for Regional NT.
Babies and pre-schoolers (0 to 4)
2021 count
447
% of total
7.1%
Change from 2016
-3.0pp
447
7.1%
-3.0pp
Primary schoolers (5 to 11)
2021 count
769
% of total
12.2%
Change from 2016
+0.4pp
769
12.2%
+0.4pp
Secondary schoolers (12 to 17)
2021 count
586
% of total
9.3%
Change from 2016
-0.3pp
586
9.3%
-0.3pp
Tertiary education and independence (18 to 24)
2021 count
858
% of total
13.7%
Change from 2016
+1.7pp
858
13.7%
+1.7pp
Young workforce (25 to 34)
2021 count
1,242
% of total
19.8%
Change from 2016
+1.8pp
1,242
19.8%
+1.8pp
Parents and homebuilders (35 to 49)
2021 count
1,300
% of total
20.7%
Change from 2016
-2.3pp
1,300
20.7%
-2.3pp
Older workers and pre-retirees (50 to 59)
2021 count
664
% of total
10.6%
Change from 2016
+0.7pp
664
10.6%
+0.7pp
Empty nesters and retirees (60 to 69)
2021 count
322
% of total
5.1%
Change from 2016
+0.9pp
322
5.1%
+0.9pp
Seniors (70 to 84)
2021 count
90
% of total
1.4%
Change from 2016
+0.1pp
90
1.4%
+0.1pp
Elderly aged (85 and over)
2021 count
4
% of total
0.1%
Change from 2016
-0.1pp
4
0.1%
-0.1pp
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-175
-3.0pp
Primary schoolers (5 to 11)
+38
+0.4pp
Secondary schoolers (12 to 17)
-5
-0.3pp
Tertiary education and independence (18 to 24)
+117
+1.7pp
Young workforce (25 to 34)
+130
+1.8pp
Parents and homebuilders (35 to 49)
-125
-2.3pp
Older workers and pre-retirees (50 to 59)
+53
+0.7pp
Empty nesters and retirees (60 to 69)
+61
+0.9pp
Seniors (70 to 84)
+11
+0.1pp
Elderly aged (85 and over)
-8
-0.1pp
Data table
Service age groups for West Arnhem (R). Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Regional NT.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional NT% | Count | % | Regional NT% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 447 | 7.1% | 7.3% | 622 | 10.1% | 8.3% | -175 | -3.0pp |
| Primary schoolers (5 to 11) | 769 | 12.2% | 11.0% | 731 | 11.8% | 11.5% | +38 | +0.4pp |
| Secondary schoolers (12 to 17) | 586 | 9.3% | 8.5% | 591 | 9.6% | 9.0% | -5 | -0.3pp |
| Tertiary education and independence (18 to 24) | 858 | 13.7% | 10.4% | 741 | 12.0% | 10.5% | +117 | +1.7pp |
| Young workforce (25 to 34) | 1,242 | 19.8% | 18.3% | 1,112 | 18.0% | 17.5% | +130 | +1.8pp |
| Parents and homebuilders (35 to 49) | 1,300 | 20.7% | 20.8% | 1,425 | 23.0% | 20.8% | -125 | -2.3pp |
| Older workers and pre-retirees (50 to 59) | 664 | 10.6% | 11.7% | 611 | 9.9% | 11.9% | +53 | +0.7pp |
| Empty nesters and retirees (60 to 69) | 322 | 5.1% | 8.0% | 261 | 4.2% | 7.2% | +61 | +0.9pp |
| Seniors (70 to 84) | 90 | 1.4% | 3.8% | 79 | 1.3% | 3.0% | +11 | +0.1pp |
| Elderly aged (85 and over) | 4 | 0.1% | 0.4% | 12 | 0.2% | 0.3% | -8 | -0.1pp |
| Total | 6,281 | 100.0% | 100.0% | 6,188 | 100.0% | 100.0% | +93 | 0.0pp |