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, 55 to 59 year olds was the largest age group among residents in Kojonup, accounting for 9.6% (111 people). This share was higher than Kojonup (S) (8.6%). Since 2016, the biggest change was in 55 to 59 year olds, which increased by 99 people, while its share fell by 19 percentage points.
Section overview
Age structure - Five year age groups
Kojonup - Total persons (Usual residence)
This table summarises five year age groups for Kojonup in 2021 for persons, with comparison against Kojonup (S) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Kojonup, with comparison markers for Kojonup (S).
0 to 4
2021 count
61
% of total
5.3%
Change from 2016
+5.3pp
61
5.3%
+5.3pp
5 to 9
2021 count
86
% of total
7.4%
Change from 2016
+7.4pp
86
7.4%
+7.4pp
10 to 14
2021 count
69
% of total
6.0%
Change from 2016
+6.0pp
69
6.0%
+6.0pp
15 to 19
2021 count
37
% of total
3.2%
Change from 2016
-3.9pp
37
3.2%
-3.9pp
20 to 24
2021 count
36
% of total
3.1%
Change from 2016
+3.1pp
36
3.1%
+3.1pp
25 to 29
2021 count
63
% of total
5.4%
Change from 2016
+5.4pp
63
5.4%
+5.4pp
30 to 34
2021 count
52
% of total
4.5%
Change from 2016
+4.5pp
52
4.5%
+4.5pp
35 to 39
2021 count
92
% of total
8.0%
Change from 2016
+8.0pp
92
8.0%
+8.0pp
40 to 44
2021 count
55
% of total
4.8%
Change from 2016
-2.3pp
55
4.8%
-2.3pp
45 to 49
2021 count
47
% of total
4.1%
Change from 2016
+4.1pp
47
4.1%
+4.1pp
50 to 54
2021 count
86
% of total
7.4%
Change from 2016
+7.4pp
86
7.4%
+7.4pp
55 to 59
2021 count
111
% of total
9.6%
Change from 2016
-19.0pp
111
9.6%
-19.0pp
60 to 64
2021 count
82
% of total
7.1%
Change from 2016
0.0pp
82
7.1%
0.0pp
65 to 69
2021 count
72
% of total
6.2%
Change from 2016
-0.9pp
72
6.2%
-0.9pp
70 to 74
2021 count
59
% of total
5.1%
Change from 2016
+5.1pp
59
5.1%
+5.1pp
75 to 79
2021 count
49
% of total
4.2%
Change from 2016
+4.2pp
49
4.2%
+4.2pp
80 to 84
2021 count
53
% of total
4.6%
Change from 2016
+4.6pp
53
4.6%
+4.6pp
85 and over
2021 count
48
% of total
4.1%
Change from 2016
+4.1pp
48
4.1%
+4.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+61
+5.3pp
5 to 9
+86
+7.4pp
10 to 14
+69
+6.0pp
15 to 19
+34
-3.9pp
20 to 24
+36
+3.1pp
25 to 29
+63
+5.4pp
30 to 34
+52
+4.5pp
35 to 39
+92
+8.0pp
40 to 44
+52
-2.3pp
45 to 49
+47
+4.1pp
50 to 54
+86
+7.4pp
55 to 59
+99
-19.0pp
60 to 64
+79
0.0pp
65 to 69
+69
-0.9pp
70 to 74
+59
+5.1pp
75 to 79
+49
+4.2pp
80 to 84
+53
+4.6pp
85 and over
+48
+4.1pp
Data table
Five year age groups for Kojonup. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Kojonup (S).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Kojonup (S)% | Count | % | Kojonup (S)% | Count | pp | |
| 0 to 4 | 61 | 5.3% | 5.7% | 0 | 0.0% | 7.5% | +61 | +5.3pp |
| 5 to 9 | 86 | 7.4% | 7.7% | 0 | 0.0% | 8.3% | +86 | +7.4pp |
| 10 to 14 | 69 | 6.0% | 6.0% | 0 | 0.0% | 5.0% | +69 | +6.0pp |
| 15 to 19 | 37 | 3.2% | 3.6% | 3 | 7.1% | 2.8% | +34 | -3.9pp |
| 20 to 24 | 36 | 3.1% | 4.1% | 0 | 0.0% | 3.6% | +36 | +3.1pp |
| 25 to 29 | 63 | 5.4% | 4.8% | 0 | 0.0% | 4.2% | +63 | +5.4pp |
| 30 to 34 | 52 | 4.5% | 4.1% | 0 | 0.0% | 7.1% | +52 | +4.5pp |
| 35 to 39 | 92 | 8.0% | 7.4% | 0 | 0.0% | 5.2% | +92 | +8.0pp |
| 40 to 44 | 55 | 4.8% | 5.7% | 3 | 7.1% | 5.4% | +52 | -2.3pp |
| 45 to 49 | 47 | 4.1% | 4.9% | 0 | 0.0% | 7.4% | +47 | +4.1pp |
| 50 to 54 | 86 | 7.4% | 7.1% | 0 | 0.0% | 8.1% | +86 | +7.4pp |
| 55 to 59 | 111 | 9.6% | 8.6% | 12 | 28.6% | 7.2% | +99 | -19.0pp |
| 60 to 64 | 82 | 7.1% | 7.5% | 3 | 7.1% | 7.1% | +79 | 0.0pp |
| 65 to 69 | 72 | 6.2% | 6.6% | 3 | 7.1% | 5.6% | +69 | -0.9pp |
| 70 to 74 | 59 | 5.1% | 5.2% | 0 | 0.0% | 4.8% | +59 | +5.1pp |
| 75 to 79 | 49 | 4.2% | 4.4% | 0 | 0.0% | 3.3% | +49 | +4.2pp |
| 80 to 84 | 53 | 4.6% | 3.4% | 0 | 0.0% | 2.7% | +53 | +4.6pp |
| 85 and over | 48 | 4.1% | 3.2% | 0 | 0.0% | 2.9% | +48 | +4.1pp |
| Total | 1,157 | 100.0% | 100.0% | 42 | 100.0% | 100.0% | +1,115 | 0.0pp |