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, 35 to 39 year olds was the largest age group among residents in Williams (S), accounting for 9.3% (95 people). This share was higher than Regional WA (6.8%). Since 2016, the biggest change was in 55 to 59 year olds, which decreased by 50 people and 5.3 percentage points.
Section overview
Age structure - Five year age groups
Williams (S) - Total persons (Usual residence)
This table summarises five year age groups for Williams (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 Williams (S), with comparison markers for Regional WA.
0 to 4
2021 count
70
% of total
6.9%
Change from 2016
-2.3pp
70
6.9%
-2.3pp
5 to 9
2021 count
83
% of total
8.1%
Change from 2016
-0.1pp
83
8.1%
-0.1pp
10 to 14
2021 count
75
% of total
7.3%
Change from 2016
+3.8pp
75
7.3%
+3.8pp
15 to 19
2021 count
32
% of total
3.1%
Change from 2016
+0.9pp
32
3.1%
+0.9pp
20 to 24
2021 count
37
% of total
3.6%
Change from 2016
+0.6pp
37
3.6%
+0.6pp
25 to 29
2021 count
44
% of total
4.3%
Change from 2016
-1.0pp
44
4.3%
-1.0pp
30 to 34
2021 count
52
% of total
5.1%
Change from 2016
-3.1pp
52
5.1%
-3.1pp
35 to 39
2021 count
95
% of total
9.3%
Change from 2016
+3.8pp
95
9.3%
+3.8pp
40 to 44
2021 count
57
% of total
5.6%
Change from 2016
-0.9pp
57
5.6%
-0.9pp
45 to 49
2021 count
58
% of total
5.7%
Change from 2016
+0.2pp
58
5.7%
+0.2pp
50 to 54
2021 count
57
% of total
5.6%
Change from 2016
-0.7pp
57
5.6%
-0.7pp
55 to 59
2021 count
52
% of total
5.1%
Change from 2016
-5.3pp
52
5.1%
-5.3pp
60 to 64
2021 count
94
% of total
9.2%
Change from 2016
+0.2pp
94
9.2%
+0.2pp
65 to 69
2021 count
71
% of total
7.0%
Change from 2016
+2.7pp
71
7.0%
+2.7pp
70 to 74
2021 count
53
% of total
5.2%
Change from 2016
-1.5pp
53
5.2%
-1.5pp
75 to 79
2021 count
46
% of total
4.5%
Change from 2016
+2.3pp
46
4.5%
+2.3pp
80 to 84
2021 count
24
% of total
2.4%
Change from 2016
-0.3pp
24
2.4%
-0.3pp
85 and over
2021 count
17
% of total
1.7%
Change from 2016
+0.2pp
17
1.7%
+0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-20
-2.3pp
5 to 9
+3
-0.1pp
10 to 14
+41
+3.8pp
15 to 19
+10
+0.9pp
20 to 24
+8
+0.6pp
25 to 29
-8
-1.0pp
30 to 34
-28
-3.1pp
35 to 39
+41
+3.8pp
40 to 44
-7
-0.9pp
45 to 49
+4
+0.2pp
50 to 54
-5
-0.7pp
55 to 59
-50
-5.3pp
60 to 64
+6
+0.2pp
65 to 69
+29
+2.7pp
70 to 74
-13
-1.5pp
75 to 79
+24
+2.3pp
80 to 84
-2
-0.3pp
85 and over
+2
+0.2pp
Data table
Five year age groups for Williams (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 | 70 | 6.9% | 6.0% | 90 | 9.2% | 6.6% | -20 | -2.3pp |
| 5 to 9 | 83 | 8.1% | 6.7% | 80 | 8.2% | 7.1% | +3 | -0.1pp |
| 10 to 14 | 75 | 7.3% | 6.7% | 34 | 3.5% | 6.5% | +41 | +3.8pp |
| 15 to 19 | 32 | 3.1% | 5.5% | 22 | 2.2% | 5.7% | +10 | +0.9pp |
| 20 to 24 | 37 | 3.6% | 4.8% | 29 | 3.0% | 5.0% | +8 | +0.6pp |
| 25 to 29 | 44 | 4.3% | 5.9% | 52 | 5.3% | 6.5% | -8 | -1.0pp |
| 30 to 34 | 52 | 5.1% | 6.6% | 80 | 8.2% | 7.1% | -28 | -3.1pp |
| 35 to 39 | 95 | 9.3% | 6.8% | 54 | 5.5% | 6.7% | +41 | +3.8pp |
| 40 to 44 | 57 | 5.6% | 6.4% | 64 | 6.5% | 7.0% | -7 | -0.9pp |
| 45 to 49 | 58 | 5.7% | 6.6% | 54 | 5.5% | 7.2% | +4 | +0.2pp |
| 50 to 54 | 57 | 5.6% | 6.9% | 62 | 6.3% | 7.1% | -5 | -0.7pp |
| 55 to 59 | 52 | 5.1% | 6.8% | 102 | 10.4% | 6.9% | -50 | -5.3pp |
| 60 to 64 | 94 | 9.2% | 6.7% | 88 | 9.0% | 6.0% | +6 | +0.2pp |
| 65 to 69 | 71 | 7.0% | 5.7% | 42 | 4.3% | 5.3% | +29 | +2.7pp |
| 70 to 74 | 53 | 5.2% | 4.9% | 66 | 6.7% | 3.6% | -13 | -1.5pp |
| 75 to 79 | 46 | 4.5% | 3.2% | 22 | 2.2% | 2.6% | +24 | +2.3pp |
| 80 to 84 | 24 | 2.4% | 2.0% | 26 | 2.7% | 1.6% | -2 | -0.3pp |
| 85 and over | 17 | 1.7% | 1.7% | 15 | 1.5% | 1.5% | +2 | +0.2pp |
| Total | 1,021 | 100.0% | 100.0% | 981 | 100.0% | 100.0% | +40 | 0.0pp |