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, 30 to 34 year olds was the largest age group among residents in Ashburton (S), accounting for 12.1% (895 people). This share was higher than Regional WA (6.6%). Since 2016, the biggest change was in 25 to 29 year olds, which decreased by 994 people and 4.1 percentage points.
Section overview
Age structure - Five year age groups
Ashburton (S) - Total persons (Usual residence)
This table summarises five year age groups for Ashburton (S) in 2021 for persons, with comparison against Regional WA and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Ashburton (S), with comparison markers for Regional WA.
0 to 4
2021 count
653
% of total
8.8%
Change from 2016
+3.4pp
653
8.8%
+3.4pp
5 to 9
2021 count
678
% of total
9.2%
Change from 2016
+4.2pp
678
9.2%
+4.2pp
10 to 14
2021 count
402
% of total
5.4%
Change from 2016
+2.4pp
402
5.4%
+2.4pp
15 to 19
2021 count
257
% of total
3.5%
Change from 2016
+1.6pp
257
3.5%
+1.6pp
20 to 24
2021 count
387
% of total
5.2%
Change from 2016
+0.9pp
387
5.2%
+0.9pp
25 to 29
2021 count
616
% of total
8.3%
Change from 2016
-4.1pp
616
8.3%
-4.1pp
30 to 34
2021 count
895
% of total
12.1%
Change from 2016
-2.1pp
895
12.1%
-2.1pp
35 to 39
2021 count
856
% of total
11.6%
Change from 2016
-0.8pp
856
11.6%
-0.8pp
40 to 44
2021 count
638
% of total
8.6%
Change from 2016
-2.4pp
638
8.6%
-2.4pp
45 to 49
2021 count
534
% of total
7.2%
Change from 2016
-2.5pp
534
7.2%
-2.5pp
50 to 54
2021 count
488
% of total
6.6%
Change from 2016
-2.2pp
488
6.6%
-2.2pp
55 to 59
2021 count
424
% of total
5.7%
Change from 2016
-1.0pp
424
5.7%
-1.0pp
60 to 64
2021 count
325
% of total
4.4%
Change from 2016
+0.7pp
325
4.4%
+0.7pp
65 to 69
2021 count
141
% of total
1.9%
Change from 2016
+0.7pp
141
1.9%
+0.7pp
70 to 74
2021 count
54
% of total
0.7%
Change from 2016
+0.4pp
54
0.7%
+0.4pp
75 to 79
2021 count
49
% of total
0.7%
Change from 2016
+0.5pp
49
0.7%
+0.5pp
80 to 84
2021 count
11
% of total
0.1%
Change from 2016
0.0pp
11
0.1%
0.0pp
85 and over
2021 count
0
% of total
0.0%
Change from 2016
0.0pp
0
0.0%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-44
+3.4pp
5 to 9
+28
+4.2pp
10 to 14
+16
+2.4pp
15 to 19
+12
+1.6pp
20 to 24
-172
+0.9pp
25 to 29
-994
-4.1pp
30 to 34
-954
-2.1pp
35 to 39
-765
-0.8pp
40 to 44
-795
-2.4pp
45 to 49
-734
-2.5pp
50 to 54
-653
-2.2pp
55 to 59
-446
-1.0pp
60 to 64
-158
+0.7pp
65 to 69
-17
+0.7pp
70 to 74
+12
+0.4pp
75 to 79
+24
+0.5pp
80 to 84
+2
0.0pp
85 and over
-5
0.0pp
Data table
Five year age groups for Ashburton (S). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Regional WA.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional WA% | Count | % | Regional WA% | Count | pp | |
| 0 to 4 | 653 | 8.8% | 6.0% | 697 | 5.4% | 6.6% | -44 | +3.4pp |
| 5 to 9 | 678 | 9.2% | 6.7% | 650 | 5.0% | 7.1% | +28 | +4.2pp |
| 10 to 14 | 402 | 5.4% | 6.7% | 386 | 3.0% | 6.5% | +16 | +2.4pp |
| 15 to 19 | 257 | 3.5% | 5.5% | 245 | 1.9% | 5.7% | +12 | +1.6pp |
| 20 to 24 | 387 | 5.2% | 4.8% | 559 | 4.3% | 5.0% | -172 | +0.9pp |
| 25 to 29 | 616 | 8.3% | 5.9% | 1,610 | 12.4% | 6.5% | -994 | -4.1pp |
| 30 to 34 | 895 | 12.1% | 6.6% | 1,849 | 14.2% | 7.1% | -954 | -2.1pp |
| 35 to 39 | 856 | 11.6% | 6.8% | 1,621 | 12.4% | 6.7% | -765 | -0.8pp |
| 40 to 44 | 638 | 8.6% | 6.4% | 1,433 | 11.0% | 7.0% | -795 | -2.4pp |
| 45 to 49 | 534 | 7.2% | 6.6% | 1,268 | 9.7% | 7.2% | -734 | -2.5pp |
| 50 to 54 | 488 | 6.6% | 6.9% | 1,141 | 8.8% | 7.1% | -653 | -2.2pp |
| 55 to 59 | 424 | 5.7% | 6.8% | 870 | 6.7% | 6.9% | -446 | -1.0pp |
| 60 to 64 | 325 | 4.4% | 6.7% | 483 | 3.7% | 6.0% | -158 | +0.7pp |
| 65 to 69 | 141 | 1.9% | 5.7% | 158 | 1.2% | 5.3% | -17 | +0.7pp |
| 70 to 74 | 54 | 0.7% | 4.9% | 42 | 0.3% | 3.6% | +12 | +0.4pp |
| 75 to 79 | 49 | 0.7% | 3.2% | 25 | 0.2% | 2.6% | +24 | +0.5pp |
| 80 to 84 | 11 | 0.1% | 2.0% | 9 | 0.1% | 1.6% | +2 | 0.0pp |
| 85 and over | 0 | 0.0% | 1.7% | 5 | 0.0% | 1.5% | -5 | 0.0pp |
| Total | 7,391 | 100.0% | 100.0% | 13,026 | 100.0% | 100.0% | -5,635 | 0.0pp |