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, 65 to 69 year olds was the largest age group among residents in Mandurah, accounting for 7.9% (692 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 214 people and 1.8 percentage points.
Section overview
Age structure - Five year age groups
Mandurah - Total persons (Usual residence)
This table summarises five year age groups for Mandurah 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 Mandurah, with comparison markers for Mandurah (C).
0 to 4
2021 count
384
% of total
4.4%
Change from 2016
-0.1pp
384
4.4%
-0.1pp
5 to 9
2021 count
313
% of total
3.6%
Change from 2016
-0.4pp
313
3.6%
-0.4pp
10 to 14
2021 count
321
% of total
3.6%
Change from 2016
+0.1pp
321
3.6%
+0.1pp
15 to 19
2021 count
393
% of total
4.5%
Change from 2016
-0.1pp
393
4.5%
-0.1pp
20 to 24
2021 count
552
% of total
6.3%
Change from 2016
-0.2pp
552
6.3%
-0.2pp
25 to 29
2021 count
523
% of total
5.9%
Change from 2016
+0.1pp
523
5.9%
+0.1pp
30 to 34
2021 count
498
% of total
5.7%
Change from 2016
-0.4pp
498
5.7%
-0.4pp
35 to 39
2021 count
479
% of total
5.4%
Change from 2016
+0.1pp
479
5.4%
+0.1pp
40 to 44
2021 count
406
% of total
4.6%
Change from 2016
-1.0pp
406
4.6%
-1.0pp
45 to 49
2021 count
501
% of total
5.7%
Change from 2016
-0.5pp
501
5.7%
-0.5pp
50 to 54
2021 count
577
% of total
6.6%
Change from 2016
0.0pp
577
6.6%
0.0pp
55 to 59
2021 count
624
% of total
7.1%
Change from 2016
-0.3pp
624
7.1%
-0.3pp
60 to 64
2021 count
668
% of total
7.6%
Change from 2016
+0.2pp
668
7.6%
+0.2pp
65 to 69
2021 count
692
% of total
7.9%
Change from 2016
+0.4pp
692
7.9%
+0.4pp
70 to 74
2021 count
672
% of total
7.6%
Change from 2016
+1.8pp
672
7.6%
+1.8pp
75 to 79
2021 count
477
% of total
5.4%
Change from 2016
+0.1pp
477
5.4%
+0.1pp
80 to 84
2021 count
337
% of total
3.8%
Change from 2016
-0.2pp
337
3.8%
-0.2pp
85 and over
2021 count
362
% of total
4.1%
Change from 2016
0.0pp
362
4.1%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+34
-0.1pp
5 to 9
-2
-0.4pp
10 to 14
+46
+0.1pp
15 to 19
+35
-0.1pp
20 to 24
+41
-0.2pp
25 to 29
+67
+0.1pp
30 to 34
+22
-0.4pp
35 to 39
+66
+0.1pp
40 to 44
-34
-1.0pp
45 to 49
+18
-0.5pp
50 to 54
+56
0.0pp
55 to 59
+44
-0.3pp
60 to 64
+89
+0.2pp
65 to 69
+107
+0.4pp
70 to 74
+214
+1.8pp
75 to 79
+58
+0.1pp
80 to 84
+27
-0.2pp
85 and over
+37
0.0pp
Data table
Five year age groups for Mandurah. 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 | 384 | 4.4% | 5.3% | 350 | 4.5% | 5.8% | +34 | -0.1pp |
| 5 to 9 | 313 | 3.6% | 5.8% | 315 | 4.0% | 6.3% | -2 | -0.4pp |
| 10 to 14 | 321 | 3.6% | 6.3% | 275 | 3.5% | 5.9% | +46 | +0.1pp |
| 15 to 19 | 393 | 4.5% | 5.5% | 358 | 4.6% | 6.0% | +35 | -0.1pp |
| 20 to 24 | 552 | 6.3% | 5.0% | 511 | 6.5% | 5.4% | +41 | -0.2pp |
| 25 to 29 | 523 | 5.9% | 4.8% | 456 | 5.8% | 5.2% | +67 | +0.1pp |
| 30 to 34 | 498 | 5.7% | 5.4% | 476 | 6.1% | 5.7% | +22 | -0.4pp |
| 35 to 39 | 479 | 5.4% | 5.8% | 413 | 5.3% | 5.4% | +66 | +0.1pp |
| 40 to 44 | 406 | 4.6% | 5.3% | 440 | 5.6% | 6.1% | -34 | -1.0pp |
| 45 to 49 | 501 | 5.7% | 5.9% | 483 | 6.2% | 6.4% | +18 | -0.5pp |
| 50 to 54 | 577 | 6.6% | 6.2% | 521 | 6.6% | 6.5% | +56 | 0.0pp |
| 55 to 59 | 624 | 7.1% | 6.6% | 580 | 7.4% | 6.3% | +44 | -0.3pp |
| 60 to 64 | 668 | 7.6% | 6.7% | 579 | 7.4% | 6.4% | +89 | +0.2pp |
| 65 to 69 | 692 | 7.9% | 6.9% | 585 | 7.5% | 6.8% | +107 | +0.4pp |
| 70 to 74 | 672 | 7.6% | 6.9% | 458 | 5.8% | 5.7% | +214 | +1.8pp |
| 75 to 79 | 477 | 5.4% | 5.1% | 419 | 5.3% | 4.6% | +58 | +0.1pp |
| 80 to 84 | 337 | 3.8% | 3.6% | 310 | 4.0% | 3.0% | +27 | -0.2pp |
| 85 and over | 362 | 4.1% | 3.0% | 325 | 4.1% | 2.6% | +37 | 0.0pp |
| Total | 8,804 | 100.0% | 100.0% | 7,837 | 100.0% | 100.0% | +967 | 0.0pp |