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 Koondoola, accounting for 8.6% (336 people). This share was higher than Wanneroo (C) (6.4%). Since 2016, the biggest change was in 20 to 24 year olds, which increased by 336 people and 8.6 percentage points.
Section overview
Age structure - Five year age groups
Koondoola - Total persons (Usual residence)
This table summarises five year age groups for Koondoola 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 Koondoola, with comparison markers for Wanneroo (C).
0 to 4
2021 count
250
% of total
6.4%
Change from 2016
+1.7pp
250
6.4%
+1.7pp
5 to 9
2021 count
282
% of total
7.2%
Change from 2016
+1.5pp
282
7.2%
+1.5pp
10 to 14
2021 count
280
% of total
7.1%
Change from 2016
+1.4pp
280
7.1%
+1.4pp
15 to 19
2021 count
277
% of total
7.1%
Change from 2016
+1.0pp
277
7.1%
+1.0pp
20 to 24
2021 count
336
% of total
8.6%
Change from 2016
+8.6pp
336
8.6%
+8.6pp
25 to 29
2021 count
269
% of total
6.9%
Change from 2016
+6.9pp
269
6.9%
+6.9pp
30 to 34
2021 count
230
% of total
5.9%
Change from 2016
+1.7pp
230
5.9%
+1.7pp
35 to 39
2021 count
272
% of total
6.9%
Change from 2016
+2.7pp
272
6.9%
+2.7pp
40 to 44
2021 count
249
% of total
6.4%
Change from 2016
+2.6pp
249
6.4%
+2.6pp
45 to 49
2021 count
245
% of total
6.3%
Change from 2016
-3.1pp
245
6.3%
-3.1pp
50 to 54
2021 count
226
% of total
5.8%
Change from 2016
-4.1pp
226
5.8%
-4.1pp
55 to 59
2021 count
216
% of total
5.5%
Change from 2016
-10.1pp
216
5.5%
-10.1pp
60 to 64
2021 count
181
% of total
4.6%
Change from 2016
-3.4pp
181
4.6%
-3.4pp
65 to 69
2021 count
178
% of total
4.5%
Change from 2016
+1.2pp
178
4.5%
+1.2pp
70 to 74
2021 count
189
% of total
4.8%
Change from 2016
+0.6pp
189
4.8%
+0.6pp
75 to 79
2021 count
122
% of total
3.1%
Change from 2016
+1.7pp
122
3.1%
+1.7pp
80 to 84
2021 count
70
% of total
1.8%
Change from 2016
-0.1pp
70
1.8%
-0.1pp
85 and over
2021 count
46
% of total
1.2%
Change from 2016
-0.2pp
46
1.2%
-0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+240
+1.7pp
5 to 9
+270
+1.5pp
10 to 14
+268
+1.4pp
15 to 19
+264
+1.0pp
20 to 24
+336
+8.6pp
25 to 29
+269
+6.9pp
30 to 34
+221
+1.7pp
35 to 39
+263
+2.7pp
40 to 44
+241
+2.6pp
45 to 49
+225
-3.1pp
50 to 54
+205
-4.1pp
55 to 59
+183
-10.1pp
60 to 64
+164
-3.4pp
65 to 69
+171
+1.2pp
70 to 74
+180
+0.6pp
75 to 79
+119
+1.7pp
80 to 84
+66
-0.1pp
85 and over
+43
-0.2pp
Data table
Five year age groups for Koondoola. 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 | 250 | 6.4% | 7.1% | 10 | 4.7% | 8.0% | +240 | +1.7pp |
| 5 to 9 | 282 | 7.2% | 7.6% | 12 | 5.7% | 7.9% | +270 | +1.5pp |
| 10 to 14 | 280 | 7.1% | 7.4% | 12 | 5.7% | 7.1% | +268 | +1.4pp |
| 15 to 19 | 277 | 7.1% | 6.6% | 13 | 6.1% | 7.1% | +264 | +1.0pp |
| 20 to 24 | 336 | 8.6% | 6.4% | 0 | 0.0% | 6.8% | +336 | +8.6pp |
| 25 to 29 | 269 | 6.9% | 6.5% | 0 | 0.0% | 7.5% | +269 | +6.9pp |
| 30 to 34 | 230 | 5.9% | 7.4% | 9 | 4.2% | 8.1% | +221 | +1.7pp |
| 35 to 39 | 272 | 6.9% | 7.9% | 9 | 4.2% | 7.5% | +263 | +2.7pp |
| 40 to 44 | 249 | 6.4% | 6.9% | 8 | 3.8% | 7.6% | +241 | +2.6pp |
| 45 to 49 | 245 | 6.3% | 7.0% | 20 | 9.4% | 7.4% | +225 | -3.1pp |
| 50 to 54 | 226 | 5.8% | 6.7% | 21 | 9.9% | 6.2% | +205 | -4.1pp |
| 55 to 59 | 216 | 5.5% | 5.7% | 33 | 15.6% | 5.0% | +183 | -10.1pp |
| 60 to 64 | 181 | 4.6% | 4.7% | 17 | 8.0% | 3.9% | +164 | -3.4pp |
| 65 to 69 | 178 | 4.5% | 3.8% | 7 | 3.3% | 3.5% | +171 | +1.2pp |
| 70 to 74 | 189 | 4.8% | 3.3% | 9 | 4.2% | 2.4% | +180 | +0.6pp |
| 75 to 79 | 122 | 3.1% | 2.2% | 3 | 1.4% | 1.8% | +119 | +1.7pp |
| 80 to 84 | 70 | 1.8% | 1.5% | 4 | 1.9% | 1.2% | +66 | -0.1pp |
| 85 and over | 46 | 1.2% | 1.3% | 3 | 1.4% | 1.0% | +43 | -0.2pp |
| Total | 3,919 | 100.0% | 100.0% | 212 | 100.0% | 100.0% | +3,707 | 0.0pp |