Population
Five year age groups
About this topic
Five year age groups show the population in standard five-year cohorts from early childhood through older age. Because each band covers the same span of years, the topic gives a clear and comparable view of an area's age structure.
This topic is useful for identifying growth or decline in specific cohorts and for comparing age patterns across places and over time. For service planning, it is often read together with service age groups, household types, and dwelling types.
Interpretation notes
- Age is reported as at Census night, so the counts are a snapshot of the resident age structure at that point in time.
- Because each band covers the same five-year span, this topic is best for exact cohort comparison rather than service-planning life stages.
Related topics
Key insight
In 2021, 25 to 29 year olds was the largest age group among residents in Unincorporated ACT, accounting for 8.6% (39,218 people). This share was similar to Australian Capital Territory (8.6%). Since 2016, the biggest change was in 35 to 39 year olds, which increased by 7,074 people and 0.6 percentage points.
Section overview
Age structure - Five year age groups
Unincorporated ACT - Total persons (Usual residence)
This table summarises five year age groups for Unincorporated ACT in 2021 for persons, with comparison against Australian Capital Territory and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Unincorporated ACT, with comparison markers for Australian Capital Territory.
0 to 4
2021 count
26,663
% of total
5.9%
Change from 2016
-0.8pp
26,663
5.9%
-0.8pp
5 to 9
2021 count
29,158
% of total
6.4%
Change from 2016
0.0pp
29,158
6.4%
0.0pp
10 to 14
2021 count
27,082
% of total
6.0%
Change from 2016
+0.4pp
27,082
6.0%
+0.4pp
15 to 19
2021 count
26,289
% of total
5.8%
Change from 2016
-0.4pp
26,289
5.8%
-0.4pp
20 to 24
2021 count
34,176
% of total
7.5%
Change from 2016
-0.4pp
34,176
7.5%
-0.4pp
25 to 29
2021 count
39,218
% of total
8.6%
Change from 2016
+0.4pp
39,218
8.6%
+0.4pp
30 to 34
2021 count
38,415
% of total
8.5%
Change from 2016
0.0pp
38,415
8.5%
0.0pp
35 to 39
2021 count
37,193
% of total
8.2%
Change from 2016
+0.6pp
37,193
8.2%
+0.6pp
40 to 44
2021 count
32,089
% of total
7.1%
Change from 2016
0.0pp
32,089
7.1%
0.0pp
45 to 49
2021 count
29,238
% of total
6.4%
Change from 2016
-0.3pp
29,238
6.4%
-0.3pp
50 to 54
2021 count
26,885
% of total
5.9%
Change from 2016
-0.2pp
26,885
5.9%
-0.2pp
55 to 59
2021 count
23,891
% of total
5.3%
Change from 2016
-0.3pp
23,891
5.3%
-0.3pp
60 to 64
2021 count
21,441
% of total
4.7%
Change from 2016
-0.1pp
21,441
4.7%
-0.1pp
65 to 69
2021 count
18,496
% of total
4.1%
Change from 2016
-0.3pp
18,496
4.1%
-0.3pp
70 to 74
2021 count
17,147
% of total
3.8%
Change from 2016
+0.7pp
17,147
3.8%
+0.7pp
75 to 79
2021 count
11,743
% of total
2.6%
Change from 2016
+0.5pp
11,743
2.6%
+0.5pp
80 to 84
2021 count
7,596
% of total
1.7%
Change from 2016
+0.2pp
7,596
1.7%
+0.2pp
85 and over
2021 count
7,176
% of total
1.6%
Change from 2016
+0.1pp
7,176
1.6%
+0.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-116
-0.8pp
5 to 9
+3,736
0.0pp
10 to 14
+4,855
+0.4pp
15 to 19
+1,820
-0.4pp
20 to 24
+2,826
-0.4pp
25 to 29
+6,799
+0.4pp
30 to 34
+4,822
0.0pp
35 to 39
+7,074
+0.6pp
40 to 44
+3,926
0.0pp
45 to 49
+2,709
-0.3pp
50 to 54
+2,500
-0.2pp
55 to 59
+1,571
-0.3pp
60 to 64
+2,326
-0.1pp
65 to 69
+1,217
-0.3pp
70 to 74
+4,993
+0.7pp
75 to 79
+3,215
+0.5pp
80 to 84
+1,762
+0.2pp
85 and over
+1,026
+0.1pp
Data table
Five year age groups for Unincorporated ACT. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Australian Capital Territory.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Australian Capital Territory% | Count | % | Australian Capital Territory% | Count | pp | |
| 0 to 4 | 26,663 | 5.9% | 5.9% | 26,779 | 6.7% | 6.7% | -116 | -0.8pp |
| 5 to 9 | 29,158 | 6.4% | 6.4% | 25,422 | 6.4% | 6.4% | +3,736 | 0.0pp |
| 10 to 14 | 27,082 | 6.0% | 6.0% | 22,227 | 5.6% | 5.6% | +4,855 | +0.4pp |
| 15 to 19 | 26,289 | 5.8% | 5.8% | 24,469 | 6.2% | 6.2% | +1,820 | -0.4pp |
| 20 to 24 | 34,176 | 7.5% | 7.5% | 31,350 | 7.9% | 7.9% | +2,826 | -0.4pp |
| 25 to 29 | 39,218 | 8.6% | 8.6% | 32,419 | 8.2% | 8.2% | +6,799 | +0.4pp |
| 30 to 34 | 38,415 | 8.5% | 8.5% | 33,593 | 8.5% | 8.5% | +4,822 | 0.0pp |
| 35 to 39 | 37,193 | 8.2% | 8.2% | 30,119 | 7.6% | 7.6% | +7,074 | +0.6pp |
| 40 to 44 | 32,089 | 7.1% | 7.1% | 28,163 | 7.1% | 7.1% | +3,926 | 0.0pp |
| 45 to 49 | 29,238 | 6.4% | 6.4% | 26,529 | 6.7% | 6.7% | +2,709 | -0.3pp |
| 50 to 54 | 26,885 | 5.9% | 5.9% | 24,385 | 6.1% | 6.1% | +2,500 | -0.2pp |
| 55 to 59 | 23,891 | 5.3% | 5.3% | 22,320 | 5.6% | 5.6% | +1,571 | -0.3pp |
| 60 to 64 | 21,441 | 4.7% | 4.7% | 19,115 | 4.8% | 4.8% | +2,326 | -0.1pp |
| 65 to 69 | 18,496 | 4.1% | 4.1% | 17,279 | 4.4% | 4.4% | +1,217 | -0.3pp |
| 70 to 74 | 17,147 | 3.8% | 3.8% | 12,154 | 3.1% | 3.1% | +4,993 | +0.7pp |
| 75 to 79 | 11,743 | 2.6% | 2.6% | 8,528 | 2.1% | 2.1% | +3,215 | +0.5pp |
| 80 to 84 | 7,596 | 1.7% | 1.7% | 5,834 | 1.5% | 1.5% | +1,762 | +0.2pp |
| 85 and over | 7,176 | 1.6% | 1.6% | 6,150 | 1.5% | 1.5% | +1,026 | +0.1pp |
| Total | 453,890 | 100.0% | 100.0% | 396,857 | 100.0% | 100.0% | +57,033 | 0.0pp |