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, 5 to 9 year olds was the largest age group among residents in Ashby (WA), accounting for 7.3% (208 people). This share was lower than Wanneroo (C) (7.6%). Since 2016, the biggest change was in 85 and over year olds, which increased by 43 people and 1.3 percentage points.
Section overview
Age structure - Five year age groups
Ashby (WA) - Total persons (Usual residence)
This table summarises five year age groups for Ashby (WA) in 2021 for persons, with comparison against Wanneroo (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Ashby (WA), with comparison markers for Wanneroo (C).
0 to 4
2021 count
201
% of total
7.1%
Change from 2016
-1.5pp
201
7.1%
-1.5pp
5 to 9
2021 count
208
% of total
7.3%
Change from 2016
-0.1pp
208
7.3%
-0.1pp
10 to 14
2021 count
164
% of total
5.8%
Change from 2016
+1.2pp
164
5.8%
+1.2pp
15 to 19
2021 count
122
% of total
4.3%
Change from 2016
-0.3pp
122
4.3%
-0.3pp
20 to 24
2021 count
165
% of total
5.8%
Change from 2016
0.0pp
165
5.8%
0.0pp
25 to 29
2021 count
171
% of total
6.0%
Change from 2016
-1.3pp
171
6.0%
-1.3pp
30 to 34
2021 count
201
% of total
7.1%
Change from 2016
-0.8pp
201
7.1%
-0.8pp
35 to 39
2021 count
208
% of total
7.3%
Change from 2016
+0.3pp
208
7.3%
+0.3pp
40 to 44
2021 count
174
% of total
6.1%
Change from 2016
-1.6pp
174
6.1%
-1.6pp
45 to 49
2021 count
198
% of total
6.9%
Change from 2016
+0.9pp
198
6.9%
+0.9pp
50 to 54
2021 count
168
% of total
5.9%
Change from 2016
+0.9pp
168
5.9%
+0.9pp
55 to 59
2021 count
125
% of total
4.4%
Change from 2016
-0.3pp
125
4.4%
-0.3pp
60 to 64
2021 count
130
% of total
4.6%
Change from 2016
+0.7pp
130
4.6%
+0.7pp
65 to 69
2021 count
128
% of total
4.5%
Change from 2016
+0.3pp
128
4.5%
+0.3pp
70 to 74
2021 count
134
% of total
4.7%
Change from 2016
+0.3pp
134
4.7%
+0.3pp
75 to 79
2021 count
136
% of total
4.8%
Change from 2016
-0.1pp
136
4.8%
-0.1pp
80 to 84
2021 count
123
% of total
4.3%
Change from 2016
+1.1pp
123
4.3%
+1.1pp
85 and over
2021 count
95
% of total
3.3%
Change from 2016
+1.3pp
95
3.3%
+1.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-27
-1.5pp
5 to 9
+12
-0.1pp
10 to 14
+41
+1.2pp
15 to 19
0
-0.3pp
20 to 24
+11
0.0pp
25 to 29
-24
-1.3pp
30 to 34
-9
-0.8pp
35 to 39
+22
+0.3pp
40 to 44
-31
-1.6pp
45 to 49
+39
+0.9pp
50 to 54
+34
+0.9pp
55 to 59
-1
-0.3pp
60 to 64
+26
+0.7pp
65 to 69
+17
+0.3pp
70 to 74
+16
+0.3pp
75 to 79
+6
-0.1pp
80 to 84
+39
+1.1pp
85 and over
+43
+1.3pp
Data table
Five year age groups for Ashby (WA). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Wanneroo (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Wanneroo (C)% | Count | % | Wanneroo (C)% | Count | pp | |
| 0 to 4 | 201 | 7.1% | 7.1% | 228 | 8.6% | 8.0% | -27 | -1.5pp |
| 5 to 9 | 208 | 7.3% | 7.6% | 196 | 7.4% | 7.9% | +12 | -0.1pp |
| 10 to 14 | 164 | 5.8% | 7.4% | 123 | 4.6% | 7.1% | +41 | +1.2pp |
| 15 to 19 | 122 | 4.3% | 6.6% | 122 | 4.6% | 7.1% | 0 | -0.3pp |
| 20 to 24 | 165 | 5.8% | 6.4% | 154 | 5.8% | 6.8% | +11 | 0.0pp |
| 25 to 29 | 171 | 6.0% | 6.5% | 195 | 7.3% | 7.5% | -24 | -1.3pp |
| 30 to 34 | 201 | 7.1% | 7.4% | 210 | 7.9% | 8.1% | -9 | -0.8pp |
| 35 to 39 | 208 | 7.3% | 7.9% | 186 | 7.0% | 7.5% | +22 | +0.3pp |
| 40 to 44 | 174 | 6.1% | 6.9% | 205 | 7.7% | 7.6% | -31 | -1.6pp |
| 45 to 49 | 198 | 6.9% | 7.0% | 159 | 6.0% | 7.4% | +39 | +0.9pp |
| 50 to 54 | 168 | 5.9% | 6.7% | 134 | 5.0% | 6.2% | +34 | +0.9pp |
| 55 to 59 | 125 | 4.4% | 5.7% | 126 | 4.7% | 5.0% | -1 | -0.3pp |
| 60 to 64 | 130 | 4.6% | 4.7% | 104 | 3.9% | 3.9% | +26 | +0.7pp |
| 65 to 69 | 128 | 4.5% | 3.8% | 111 | 4.2% | 3.5% | +17 | +0.3pp |
| 70 to 74 | 134 | 4.7% | 3.3% | 118 | 4.4% | 2.4% | +16 | +0.3pp |
| 75 to 79 | 136 | 4.8% | 2.2% | 130 | 4.9% | 1.8% | +6 | -0.1pp |
| 80 to 84 | 123 | 4.3% | 1.5% | 84 | 3.2% | 1.2% | +39 | +1.1pp |
| 85 and over | 95 | 3.3% | 1.3% | 52 | 2.0% | 1.0% | +43 | +1.3pp |
| Total | 2,850 | 100.0% | 100.0% | 2,665 | 100.0% | 100.0% | +185 | 0.0pp |