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, 30 to 34 year olds was the largest age group among residents in Girrawheen, accounting for 7.7% (682 people). This share was higher than Wanneroo (C) (7.4%). Since 2016, the biggest change was in 0 to 4 year olds, which decreased by 79 people and 1 percentage point.
Section overview
Age structure - Five year age groups
Girrawheen - Total persons (Usual residence)
This table summarises five year age groups for Girrawheen 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 Girrawheen, with comparison markers for Wanneroo (C).
0 to 4
2021 count
589
% of total
6.6%
Change from 2016
-1.0pp
589
6.6%
-1.0pp
5 to 9
2021 count
584
% of total
6.6%
Change from 2016
-0.7pp
584
6.6%
-0.7pp
10 to 14
2021 count
576
% of total
6.5%
Change from 2016
0.0pp
576
6.5%
0.0pp
15 to 19
2021 count
547
% of total
6.1%
Change from 2016
-0.4pp
547
6.1%
-0.4pp
20 to 24
2021 count
643
% of total
7.2%
Change from 2016
+0.2pp
643
7.2%
+0.2pp
25 to 29
2021 count
672
% of total
7.6%
Change from 2016
-0.7pp
672
7.6%
-0.7pp
30 to 34
2021 count
682
% of total
7.7%
Change from 2016
-0.2pp
682
7.7%
-0.2pp
35 to 39
2021 count
680
% of total
7.6%
Change from 2016
+0.5pp
680
7.6%
+0.5pp
40 to 44
2021 count
595
% of total
6.7%
Change from 2016
0.0pp
595
6.7%
0.0pp
45 to 49
2021 count
599
% of total
6.7%
Change from 2016
+0.1pp
599
6.7%
+0.1pp
50 to 54
2021 count
508
% of total
5.7%
Change from 2016
+0.1pp
508
5.7%
+0.1pp
55 to 59
2021 count
490
% of total
5.5%
Change from 2016
+0.3pp
490
5.5%
+0.3pp
60 to 64
2021 count
421
% of total
4.7%
Change from 2016
-0.3pp
421
4.7%
-0.3pp
65 to 69
2021 count
435
% of total
4.9%
Change from 2016
+0.2pp
435
4.9%
+0.2pp
70 to 74
2021 count
368
% of total
4.1%
Change from 2016
+0.7pp
368
4.1%
+0.7pp
75 to 79
2021 count
240
% of total
2.7%
Change from 2016
+0.5pp
240
2.7%
+0.5pp
80 to 84
2021 count
158
% of total
1.8%
Change from 2016
+0.5pp
158
1.8%
+0.5pp
85 and over
2021 count
100
% of total
1.1%
Change from 2016
+0.3pp
100
1.1%
+0.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-79
-1.0pp
5 to 9
-55
-0.7pp
10 to 14
+7
0.0pp
15 to 19
-26
-0.4pp
20 to 24
+33
+0.2pp
25 to 29
-51
-0.7pp
30 to 34
-14
-0.2pp
35 to 39
+61
+0.5pp
40 to 44
+12
0.0pp
45 to 49
+23
+0.1pp
50 to 54
+14
+0.1pp
55 to 59
+31
+0.3pp
60 to 64
-18
-0.3pp
65 to 69
+20
+0.2pp
70 to 74
+72
+0.7pp
75 to 79
+44
+0.5pp
80 to 84
+41
+0.5pp
85 and over
+30
+0.3pp
Data table
Five year age groups for Girrawheen. 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 | 589 | 6.6% | 7.1% | 668 | 7.6% | 8.0% | -79 | -1.0pp |
| 5 to 9 | 584 | 6.6% | 7.6% | 639 | 7.3% | 7.9% | -55 | -0.7pp |
| 10 to 14 | 576 | 6.5% | 7.4% | 569 | 6.5% | 7.1% | +7 | 0.0pp |
| 15 to 19 | 547 | 6.1% | 6.6% | 573 | 6.5% | 7.1% | -26 | -0.4pp |
| 20 to 24 | 643 | 7.2% | 6.4% | 610 | 7.0% | 6.8% | +33 | +0.2pp |
| 25 to 29 | 672 | 7.6% | 6.5% | 723 | 8.3% | 7.5% | -51 | -0.7pp |
| 30 to 34 | 682 | 7.7% | 7.4% | 696 | 7.9% | 8.1% | -14 | -0.2pp |
| 35 to 39 | 680 | 7.6% | 7.9% | 619 | 7.1% | 7.5% | +61 | +0.5pp |
| 40 to 44 | 595 | 6.7% | 6.9% | 583 | 6.7% | 7.6% | +12 | 0.0pp |
| 45 to 49 | 599 | 6.7% | 7.0% | 576 | 6.6% | 7.4% | +23 | +0.1pp |
| 50 to 54 | 508 | 5.7% | 6.7% | 494 | 5.6% | 6.2% | +14 | +0.1pp |
| 55 to 59 | 490 | 5.5% | 5.7% | 459 | 5.2% | 5.0% | +31 | +0.3pp |
| 60 to 64 | 421 | 4.7% | 4.7% | 439 | 5.0% | 3.9% | -18 | -0.3pp |
| 65 to 69 | 435 | 4.9% | 3.8% | 415 | 4.7% | 3.5% | +20 | +0.2pp |
| 70 to 74 | 368 | 4.1% | 3.3% | 296 | 3.4% | 2.4% | +72 | +0.7pp |
| 75 to 79 | 240 | 2.7% | 2.2% | 196 | 2.2% | 1.8% | +44 | +0.5pp |
| 80 to 84 | 158 | 1.8% | 1.5% | 117 | 1.3% | 1.2% | +41 | +0.5pp |
| 85 and over | 100 | 1.1% | 1.3% | 70 | 0.8% | 1.0% | +30 | +0.3pp |
| Total | 8,897 | 100.0% | 100.0% | 8,759 | 100.0% | 100.0% | +138 | 0.0pp |