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, 70 to 74 year olds was the largest age group among residents in Dudley Park (WA), accounting for 8.7% (607 people). This share was higher than Mandurah (C) (6.9%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 136 people and 1.2 percentage points.
Section overview
Age structure - Five year age groups
Dudley Park (WA) - Total persons (Usual residence)
This table summarises five year age groups for Dudley Park (WA) in 2021 for persons, with comparison against Mandurah (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Dudley Park (WA), with comparison markers for Mandurah (C).
0 to 4
2021 count
266
% of total
3.8%
Change from 2016
-0.7pp
266
3.8%
-0.7pp
5 to 9
2021 count
314
% of total
4.5%
Change from 2016
0.0pp
314
4.5%
0.0pp
10 to 14
2021 count
338
% of total
4.9%
Change from 2016
+0.5pp
338
4.9%
+0.5pp
15 to 19
2021 count
328
% of total
4.7%
Change from 2016
-0.4pp
328
4.7%
-0.4pp
20 to 24
2021 count
326
% of total
4.7%
Change from 2016
-0.3pp
326
4.7%
-0.3pp
25 to 29
2021 count
300
% of total
4.3%
Change from 2016
+0.1pp
300
4.3%
+0.1pp
30 to 34
2021 count
298
% of total
4.3%
Change from 2016
-0.6pp
298
4.3%
-0.6pp
35 to 39
2021 count
296
% of total
4.3%
Change from 2016
-0.2pp
296
4.3%
-0.2pp
40 to 44
2021 count
312
% of total
4.5%
Change from 2016
-0.4pp
312
4.5%
-0.4pp
45 to 49
2021 count
398
% of total
5.7%
Change from 2016
+0.2pp
398
5.7%
+0.2pp
50 to 54
2021 count
441
% of total
6.3%
Change from 2016
-0.5pp
441
6.3%
-0.5pp
55 to 59
2021 count
495
% of total
7.1%
Change from 2016
-0.3pp
495
7.1%
-0.3pp
60 to 64
2021 count
528
% of total
7.6%
Change from 2016
+0.4pp
528
7.6%
+0.4pp
65 to 69
2021 count
568
% of total
8.2%
Change from 2016
-0.5pp
568
8.2%
-0.5pp
70 to 74
2021 count
607
% of total
8.7%
Change from 2016
+1.2pp
607
8.7%
+1.2pp
75 to 79
2021 count
470
% of total
6.8%
Change from 2016
+0.6pp
470
6.8%
+0.6pp
80 to 84
2021 count
339
% of total
4.9%
Change from 2016
+0.7pp
339
4.9%
+0.7pp
85 and over
2021 count
338
% of total
4.9%
Change from 2016
+0.6pp
338
4.9%
+0.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-12
-0.7pp
5 to 9
+36
0.0pp
10 to 14
+63
+0.5pp
15 to 19
+12
-0.4pp
20 to 24
+16
-0.3pp
25 to 29
+38
+0.1pp
30 to 34
-10
-0.6pp
35 to 39
+14
-0.2pp
40 to 44
+5
-0.4pp
45 to 49
+54
+0.2pp
50 to 54
+14
-0.5pp
55 to 59
+34
-0.3pp
60 to 64
+76
+0.4pp
65 to 69
+27
-0.5pp
70 to 74
+136
+1.2pp
75 to 79
+85
+0.6pp
80 to 84
+75
+0.7pp
85 and over
+71
+0.6pp
Data table
Five year age groups for Dudley Park (WA). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Mandurah (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mandurah (C)% | Count | % | Mandurah (C)% | Count | pp | |
| 0 to 4 | 266 | 3.8% | 5.3% | 278 | 4.5% | 5.8% | -12 | -0.7pp |
| 5 to 9 | 314 | 4.5% | 5.8% | 278 | 4.5% | 6.3% | +36 | 0.0pp |
| 10 to 14 | 338 | 4.9% | 6.3% | 275 | 4.4% | 5.9% | +63 | +0.5pp |
| 15 to 19 | 328 | 4.7% | 5.5% | 316 | 5.1% | 6.0% | +12 | -0.4pp |
| 20 to 24 | 326 | 4.7% | 5.0% | 310 | 5.0% | 5.4% | +16 | -0.3pp |
| 25 to 29 | 300 | 4.3% | 4.8% | 262 | 4.2% | 5.2% | +38 | +0.1pp |
| 30 to 34 | 298 | 4.3% | 5.4% | 308 | 4.9% | 5.7% | -10 | -0.6pp |
| 35 to 39 | 296 | 4.3% | 5.8% | 282 | 4.5% | 5.4% | +14 | -0.2pp |
| 40 to 44 | 312 | 4.5% | 5.3% | 307 | 4.9% | 6.1% | +5 | -0.4pp |
| 45 to 49 | 398 | 5.7% | 5.9% | 344 | 5.5% | 6.4% | +54 | +0.2pp |
| 50 to 54 | 441 | 6.3% | 6.2% | 427 | 6.8% | 6.5% | +14 | -0.5pp |
| 55 to 59 | 495 | 7.1% | 6.6% | 461 | 7.4% | 6.3% | +34 | -0.3pp |
| 60 to 64 | 528 | 7.6% | 6.7% | 452 | 7.2% | 6.4% | +76 | +0.4pp |
| 65 to 69 | 568 | 8.2% | 6.9% | 541 | 8.7% | 6.8% | +27 | -0.5pp |
| 70 to 74 | 607 | 8.7% | 6.9% | 471 | 7.5% | 5.7% | +136 | +1.2pp |
| 75 to 79 | 470 | 6.8% | 5.1% | 385 | 6.2% | 4.6% | +85 | +0.6pp |
| 80 to 84 | 339 | 4.9% | 3.6% | 264 | 4.2% | 3.0% | +75 | +0.7pp |
| 85 and over | 338 | 4.9% | 3.0% | 267 | 4.3% | 2.6% | +71 | +0.6pp |
| Total | 6,957 | 100.0% | 100.0% | 6,240 | 100.0% | 100.0% | +717 | 0.0pp |