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, 60 to 64 year olds was the largest age group among residents in Merredin (S), accounting for 7.3% (227 people). This share was higher than Regional WA (6.7%). Since 2016, the biggest change was in 20 to 24 year olds, which decreased by 136 people and 3.7 percentage points.
Section overview
Age structure - Five year age groups
Merredin (S) - Total persons (Usual residence)
This table summarises five year age groups for Merredin (S) in 2021 for persons, with comparison against Regional WA and change since 2016.
Chart view
Age structure - Five year age groups snapshot
2021 distribution by category for Merredin (S), with comparison markers for Regional WA.
0 to 4
2021 count
185
% of total
5.9%
Change from 2016
-0.2pp
185
5.9%
-0.2pp
5 to 9
2021 count
180
% of total
5.8%
Change from 2016
-1.0pp
180
5.8%
-1.0pp
10 to 14
2021 count
217
% of total
7.0%
Change from 2016
+0.8pp
217
7.0%
+0.8pp
15 to 19
2021 count
179
% of total
5.7%
Change from 2016
-0.4pp
179
5.7%
-0.4pp
20 to 24
2021 count
166
% of total
5.3%
Change from 2016
-3.7pp
166
5.3%
-3.7pp
25 to 29
2021 count
195
% of total
6.3%
Change from 2016
+0.5pp
195
6.3%
+0.5pp
30 to 34
2021 count
178
% of total
5.7%
Change from 2016
-0.5pp
178
5.7%
-0.5pp
35 to 39
2021 count
181
% of total
5.8%
Change from 2016
+0.6pp
181
5.8%
+0.6pp
40 to 44
2021 count
190
% of total
6.1%
Change from 2016
+0.3pp
190
6.1%
+0.3pp
45 to 49
2021 count
185
% of total
5.9%
Change from 2016
-0.7pp
185
5.9%
-0.7pp
50 to 54
2021 count
205
% of total
6.6%
Change from 2016
-0.2pp
205
6.6%
-0.2pp
55 to 59
2021 count
223
% of total
7.1%
Change from 2016
+0.1pp
223
7.1%
+0.1pp
60 to 64
2021 count
227
% of total
7.3%
Change from 2016
+1.5pp
227
7.3%
+1.5pp
65 to 69
2021 count
188
% of total
6.0%
Change from 2016
+0.8pp
188
6.0%
+0.8pp
70 to 74
2021 count
178
% of total
5.7%
Change from 2016
+2.0pp
178
5.7%
+2.0pp
75 to 79
2021 count
85
% of total
2.7%
Change from 2016
+0.1pp
85
2.7%
+0.1pp
80 to 84
2021 count
74
% of total
2.4%
Change from 2016
+0.6pp
74
2.4%
+0.6pp
85 and over
2021 count
66
% of total
2.1%
Change from 2016
0.0pp
66
2.1%
0.0pp
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-18
-0.2pp
5 to 9
-48
-1.0pp
10 to 14
+10
+0.8pp
15 to 19
-24
-0.4pp
20 to 24
-136
-3.7pp
25 to 29
+1
+0.5pp
30 to 34
-29
-0.5pp
35 to 39
+8
+0.6pp
40 to 44
-4
+0.3pp
45 to 49
-37
-0.7pp
50 to 54
-23
-0.2pp
55 to 59
-13
+0.1pp
60 to 64
+33
+1.5pp
65 to 69
+15
+0.8pp
70 to 74
+55
+2.0pp
75 to 79
-3
+0.1pp
80 to 84
+14
+0.6pp
85 and over
-4
0.0pp
Data table
Five year age groups for Merredin (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 | 185 | 5.9% | 6.0% | 203 | 6.1% | 6.6% | -18 | -0.2pp |
| 5 to 9 | 180 | 5.8% | 6.7% | 228 | 6.8% | 7.1% | -48 | -1.0pp |
| 10 to 14 | 217 | 7.0% | 6.7% | 207 | 6.2% | 6.5% | +10 | +0.8pp |
| 15 to 19 | 179 | 5.7% | 5.5% | 203 | 6.1% | 5.7% | -24 | -0.4pp |
| 20 to 24 | 166 | 5.3% | 4.8% | 302 | 9.0% | 5.0% | -136 | -3.7pp |
| 25 to 29 | 195 | 6.3% | 5.9% | 194 | 5.8% | 6.5% | +1 | +0.5pp |
| 30 to 34 | 178 | 5.7% | 6.6% | 207 | 6.2% | 7.1% | -29 | -0.5pp |
| 35 to 39 | 181 | 5.8% | 6.8% | 173 | 5.2% | 6.7% | +8 | +0.6pp |
| 40 to 44 | 190 | 6.1% | 6.4% | 194 | 5.8% | 7.0% | -4 | +0.3pp |
| 45 to 49 | 185 | 5.9% | 6.6% | 222 | 6.6% | 7.2% | -37 | -0.7pp |
| 50 to 54 | 205 | 6.6% | 6.9% | 228 | 6.8% | 7.1% | -23 | -0.2pp |
| 55 to 59 | 223 | 7.1% | 6.8% | 236 | 7.0% | 6.9% | -13 | +0.1pp |
| 60 to 64 | 227 | 7.3% | 6.7% | 194 | 5.8% | 6.0% | +33 | +1.5pp |
| 65 to 69 | 188 | 6.0% | 5.7% | 173 | 5.2% | 5.3% | +15 | +0.8pp |
| 70 to 74 | 178 | 5.7% | 4.9% | 123 | 3.7% | 3.6% | +55 | +2.0pp |
| 75 to 79 | 85 | 2.7% | 3.2% | 88 | 2.6% | 2.6% | -3 | +0.1pp |
| 80 to 84 | 74 | 2.4% | 2.0% | 60 | 1.8% | 1.6% | +14 | +0.6pp |
| 85 and over | 66 | 2.1% | 1.7% | 70 | 2.1% | 1.5% | -4 | 0.0pp |
| Total | 3,119 | 100.0% | 100.0% | 3,350 | 100.0% | 100.0% | -231 | 0.0pp |