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 Alexander Heights, accounting for 7.9% (616 people). This share was higher than Wanneroo (C) (4.7%). Since 2016, the biggest change was in 60 to 64 year olds, which increased by 188 people and 2.5 percentage points.
Section overview
Age structure - Five year age groups
Alexander Heights - Total persons (Usual residence)
This table summarises five year age groups for Alexander Heights 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 Alexander Heights, with comparison markers for Wanneroo (C).
0 to 4
2021 count
456
% of total
5.9%
Change from 2016
-0.2pp
456
5.9%
-0.2pp
5 to 9
2021 count
501
% of total
6.4%
Change from 2016
-0.6pp
501
6.4%
-0.6pp
10 to 14
2021 count
511
% of total
6.6%
Change from 2016
+0.1pp
511
6.6%
+0.1pp
15 to 19
2021 count
492
% of total
6.3%
Change from 2016
-1.1pp
492
6.3%
-1.1pp
20 to 24
2021 count
540
% of total
6.9%
Change from 2016
-0.6pp
540
6.9%
-0.6pp
25 to 29
2021 count
463
% of total
6.0%
Change from 2016
-0.2pp
463
6.0%
-0.2pp
30 to 34
2021 count
487
% of total
6.3%
Change from 2016
-0.2pp
487
6.3%
-0.2pp
35 to 39
2021 count
517
% of total
6.7%
Change from 2016
+0.3pp
517
6.7%
+0.3pp
40 to 44
2021 count
470
% of total
6.0%
Change from 2016
-0.9pp
470
6.0%
-0.9pp
45 to 49
2021 count
486
% of total
6.3%
Change from 2016
-0.8pp
486
6.3%
-0.8pp
50 to 54
2021 count
540
% of total
6.9%
Change from 2016
-1.0pp
540
6.9%
-1.0pp
55 to 59
2021 count
563
% of total
7.2%
Change from 2016
-1.2pp
563
7.2%
-1.2pp
60 to 64
2021 count
616
% of total
7.9%
Change from 2016
+2.5pp
616
7.9%
+2.5pp
65 to 69
2021 count
396
% of total
5.1%
Change from 2016
+1.2pp
396
5.1%
+1.2pp
70 to 74
2021 count
301
% of total
3.9%
Change from 2016
+1.2pp
301
3.9%
+1.2pp
75 to 79
2021 count
200
% of total
2.6%
Change from 2016
+0.5pp
200
2.6%
+0.5pp
80 to 84
2021 count
116
% of total
1.5%
Change from 2016
0.0pp
116
1.5%
0.0pp
85 and over
2021 count
104
% of total
1.3%
Change from 2016
+0.5pp
104
1.3%
+0.5pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-25
-0.2pp
5 to 9
-57
-0.6pp
10 to 14
-8
+0.1pp
15 to 19
-93
-1.1pp
20 to 24
-58
-0.6pp
25 to 29
-31
-0.2pp
30 to 34
-28
-0.2pp
35 to 39
+7
+0.3pp
40 to 44
-73
-0.9pp
45 to 49
-80
-0.8pp
50 to 54
-84
-1.0pp
55 to 59
-101
-1.2pp
60 to 64
+188
+2.5pp
65 to 69
+86
+1.2pp
70 to 74
+89
+1.2pp
75 to 79
+32
+0.5pp
80 to 84
-4
0.0pp
85 and over
+42
+0.5pp
Data table
Five year age groups for Alexander Heights. 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 | 456 | 5.9% | 7.1% | 481 | 6.1% | 8.0% | -25 | -0.2pp |
| 5 to 9 | 501 | 6.4% | 7.6% | 558 | 7.0% | 7.9% | -57 | -0.6pp |
| 10 to 14 | 511 | 6.6% | 7.4% | 519 | 6.5% | 7.1% | -8 | +0.1pp |
| 15 to 19 | 492 | 6.3% | 6.6% | 585 | 7.4% | 7.1% | -93 | -1.1pp |
| 20 to 24 | 540 | 6.9% | 6.4% | 598 | 7.5% | 6.8% | -58 | -0.6pp |
| 25 to 29 | 463 | 6.0% | 6.5% | 494 | 6.2% | 7.5% | -31 | -0.2pp |
| 30 to 34 | 487 | 6.3% | 7.4% | 515 | 6.5% | 8.1% | -28 | -0.2pp |
| 35 to 39 | 517 | 6.7% | 7.9% | 510 | 6.4% | 7.5% | +7 | +0.3pp |
| 40 to 44 | 470 | 6.0% | 6.9% | 543 | 6.9% | 7.6% | -73 | -0.9pp |
| 45 to 49 | 486 | 6.3% | 7.0% | 566 | 7.1% | 7.4% | -80 | -0.8pp |
| 50 to 54 | 540 | 6.9% | 6.7% | 624 | 7.9% | 6.2% | -84 | -1.0pp |
| 55 to 59 | 563 | 7.2% | 5.7% | 664 | 8.4% | 5.0% | -101 | -1.2pp |
| 60 to 64 | 616 | 7.9% | 4.7% | 428 | 5.4% | 3.9% | +188 | +2.5pp |
| 65 to 69 | 396 | 5.1% | 3.8% | 310 | 3.9% | 3.5% | +86 | +1.2pp |
| 70 to 74 | 301 | 3.9% | 3.3% | 212 | 2.7% | 2.4% | +89 | +1.2pp |
| 75 to 79 | 200 | 2.6% | 2.2% | 168 | 2.1% | 1.8% | +32 | +0.5pp |
| 80 to 84 | 116 | 1.5% | 1.5% | 120 | 1.5% | 1.2% | -4 | 0.0pp |
| 85 and over | 104 | 1.3% | 1.3% | 62 | 0.8% | 1.0% | +42 | +0.5pp |
| Total | 7,772 | 100.0% | 100.0% | 7,924 | 100.0% | 100.0% | -152 | 0.0pp |