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, 20 to 24 year olds was the largest age group among residents in Willmot, accounting for 8.2% (195 people). This share was higher than Blacktown (C) (6.7%). Since 2016, the biggest change was in 65 to 69 year olds, which decreased by 55 people and 2.2 percentage points.
Section overview
Age structure - Five year age groups
Willmot - Total persons (Usual residence)
This table summarises five year age groups for Willmot in 2021 for persons, with comparison against Blacktown (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Willmot, with comparison markers for Blacktown (C).
0 to 4
2021 count
171
% of total
7.2%
Change from 2016
-0.6pp
171
7.2%
-0.6pp
5 to 9
2021 count
175
% of total
7.3%
Change from 2016
-1.3pp
175
7.3%
-1.3pp
10 to 14
2021 count
184
% of total
7.7%
Change from 2016
-1.6pp
184
7.7%
-1.6pp
15 to 19
2021 count
180
% of total
7.6%
Change from 2016
-1.9pp
180
7.6%
-1.9pp
20 to 24
2021 count
195
% of total
8.2%
Change from 2016
+0.6pp
195
8.2%
+0.6pp
25 to 29
2021 count
184
% of total
7.7%
Change from 2016
+1.1pp
184
7.7%
+1.1pp
30 to 34
2021 count
153
% of total
6.4%
Change from 2016
+0.4pp
153
6.4%
+0.4pp
35 to 39
2021 count
146
% of total
6.1%
Change from 2016
+0.8pp
146
6.1%
+0.8pp
40 to 44
2021 count
115
% of total
4.8%
Change from 2016
-1.3pp
115
4.8%
-1.3pp
45 to 49
2021 count
157
% of total
6.6%
Change from 2016
+0.9pp
157
6.6%
+0.9pp
50 to 54
2021 count
145
% of total
6.1%
Change from 2016
+0.8pp
145
6.1%
+0.8pp
55 to 59
2021 count
128
% of total
5.4%
Change from 2016
+0.1pp
128
5.4%
+0.1pp
60 to 64
2021 count
99
% of total
4.2%
Change from 2016
-0.2pp
99
4.2%
-0.2pp
65 to 69
2021 count
91
% of total
3.8%
Change from 2016
-2.2pp
91
3.8%
-2.2pp
70 to 74
2021 count
133
% of total
5.6%
Change from 2016
+2.0pp
133
5.6%
+2.0pp
75 to 79
2021 count
62
% of total
2.6%
Change from 2016
-0.1pp
62
2.6%
-0.1pp
80 to 84
2021 count
40
% of total
1.7%
Change from 2016
+0.7pp
40
1.7%
+0.7pp
85 and over
2021 count
14
% of total
0.6%
Change from 2016
+0.1pp
14
0.6%
+0.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-18
-0.6pp
5 to 9
-34
-1.3pp
10 to 14
-42
-1.6pp
15 to 19
-52
-1.9pp
20 to 24
+10
+0.6pp
25 to 29
+23
+1.1pp
30 to 34
+8
+0.4pp
35 to 39
+16
+0.8pp
40 to 44
-33
-1.3pp
45 to 49
+19
+0.9pp
50 to 54
+17
+0.8pp
55 to 59
-1
+0.1pp
60 to 64
-7
-0.2pp
65 to 69
-55
-2.2pp
70 to 74
+45
+2.0pp
75 to 79
-3
-0.1pp
80 to 84
+16
+0.7pp
85 and over
+1
+0.1pp
Data table
Five year age groups for Willmot. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Blacktown (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Blacktown (C)% | Count | % | Blacktown (C)% | Count | pp | |
| 0 to 4 | 171 | 7.2% | 7.5% | 189 | 7.8% | 8.0% | -18 | -0.6pp |
| 5 to 9 | 175 | 7.3% | 7.9% | 209 | 8.6% | 7.9% | -34 | -1.3pp |
| 10 to 14 | 184 | 7.7% | 7.3% | 226 | 9.3% | 6.9% | -42 | -1.6pp |
| 15 to 19 | 180 | 7.6% | 6.1% | 232 | 9.5% | 6.9% | -52 | -1.9pp |
| 20 to 24 | 195 | 8.2% | 6.7% | 185 | 7.6% | 6.8% | +10 | +0.6pp |
| 25 to 29 | 184 | 7.7% | 7.0% | 161 | 6.6% | 7.2% | +23 | +1.1pp |
| 30 to 34 | 153 | 6.4% | 7.9% | 145 | 6.0% | 8.3% | +8 | +0.4pp |
| 35 to 39 | 146 | 6.1% | 9.2% | 130 | 5.3% | 8.1% | +16 | +0.8pp |
| 40 to 44 | 115 | 4.8% | 7.8% | 148 | 6.1% | 7.2% | -33 | -1.3pp |
| 45 to 49 | 157 | 6.6% | 6.4% | 138 | 5.7% | 6.5% | +19 | +0.9pp |
| 50 to 54 | 145 | 6.1% | 5.6% | 128 | 5.3% | 6.0% | +17 | +0.8pp |
| 55 to 59 | 128 | 5.4% | 5.1% | 129 | 5.3% | 5.4% | -1 | +0.1pp |
| 60 to 64 | 99 | 4.2% | 4.5% | 106 | 4.4% | 4.6% | -7 | -0.2pp |
| 65 to 69 | 91 | 3.8% | 3.7% | 146 | 6.0% | 3.8% | -55 | -2.2pp |
| 70 to 74 | 133 | 5.6% | 3.1% | 88 | 3.6% | 2.5% | +45 | +2.0pp |
| 75 to 79 | 62 | 2.6% | 1.9% | 65 | 2.7% | 1.7% | -3 | -0.1pp |
| 80 to 84 | 40 | 1.7% | 1.2% | 24 | 1.0% | 1.1% | +16 | +0.7pp |
| 85 and over | 14 | 0.6% | 1.1% | 13 | 0.5% | 1.1% | +1 | +0.1pp |
| Total | 2,382 | 100.0% | 100.0% | 2,430 | 100.0% | 100.0% | -48 | 0.0pp |