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, 5 to 9 year olds was the largest age group among residents in Yanchep, accounting for 8.9% (977 people). This share was higher than Wanneroo (C) (7.6%). Since 2016, the biggest change was in 10 to 14 year olds, which increased by 270 people and 1.1 percentage points.
Section overview
Age structure - Five year age groups
Yanchep - Total persons (Usual residence)
This table summarises five year age groups for Yanchep 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 Yanchep, with comparison markers for Wanneroo (C).
0 to 4
2021 count
898
% of total
8.1%
Change from 2016
-1.0pp
898
8.1%
-1.0pp
5 to 9
2021 count
977
% of total
8.9%
Change from 2016
+0.5pp
977
8.9%
+0.5pp
10 to 14
2021 count
884
% of total
8.0%
Change from 2016
+1.1pp
884
8.0%
+1.1pp
15 to 19
2021 count
676
% of total
6.1%
Change from 2016
+0.6pp
676
6.1%
+0.6pp
20 to 24
2021 count
519
% of total
4.7%
Change from 2016
-1.1pp
519
4.7%
-1.1pp
25 to 29
2021 count
686
% of total
6.2%
Change from 2016
-1.2pp
686
6.2%
-1.2pp
30 to 34
2021 count
808
% of total
7.3%
Change from 2016
-0.6pp
808
7.3%
-0.6pp
35 to 39
2021 count
846
% of total
7.7%
Change from 2016
+0.4pp
846
7.7%
+0.4pp
40 to 44
2021 count
712
% of total
6.5%
Change from 2016
-0.9pp
712
6.5%
-0.9pp
45 to 49
2021 count
703
% of total
6.4%
Change from 2016
-0.7pp
703
6.4%
-0.7pp
50 to 54
2021 count
721
% of total
6.5%
Change from 2016
+0.6pp
721
6.5%
+0.6pp
55 to 59
2021 count
612
% of total
5.6%
Change from 2016
+0.9pp
612
5.6%
+0.9pp
60 to 64
2021 count
509
% of total
4.6%
Change from 2016
+0.7pp
509
4.6%
+0.7pp
65 to 69
2021 count
441
% of total
4.0%
Change from 2016
-0.2pp
441
4.0%
-0.2pp
70 to 74
2021 count
412
% of total
3.7%
Change from 2016
+0.3pp
412
3.7%
+0.3pp
75 to 79
2021 count
317
% of total
2.9%
Change from 2016
+0.7pp
317
2.9%
+0.7pp
80 to 84
2021 count
185
% of total
1.7%
Change from 2016
+0.4pp
185
1.7%
+0.4pp
85 and over
2021 count
151
% of total
1.4%
Change from 2016
0.0pp
151
1.4%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+90
-1.0pp
5 to 9
+234
+0.5pp
10 to 14
+270
+1.1pp
15 to 19
+185
+0.6pp
20 to 24
+6
-1.1pp
25 to 29
+30
-1.2pp
30 to 34
+107
-0.6pp
35 to 39
+198
+0.4pp
40 to 44
+60
-0.9pp
45 to 49
+73
-0.7pp
50 to 54
+194
+0.6pp
55 to 59
+194
+0.9pp
60 to 64
+160
+0.7pp
65 to 69
+68
-0.2pp
70 to 74
+108
+0.3pp
75 to 79
+120
+0.7pp
80 to 84
+68
+0.4pp
85 and over
+24
0.0pp
Data table
Five year age groups for Yanchep. 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 | 898 | 8.1% | 7.1% | 808 | 9.1% | 8.0% | +90 | -1.0pp |
| 5 to 9 | 977 | 8.9% | 7.6% | 743 | 8.4% | 7.9% | +234 | +0.5pp |
| 10 to 14 | 884 | 8.0% | 7.4% | 614 | 6.9% | 7.1% | +270 | +1.1pp |
| 15 to 19 | 676 | 6.1% | 6.6% | 491 | 5.5% | 7.1% | +185 | +0.6pp |
| 20 to 24 | 519 | 4.7% | 6.4% | 513 | 5.8% | 6.8% | +6 | -1.1pp |
| 25 to 29 | 686 | 6.2% | 6.5% | 656 | 7.4% | 7.5% | +30 | -1.2pp |
| 30 to 34 | 808 | 7.3% | 7.4% | 701 | 7.9% | 8.1% | +107 | -0.6pp |
| 35 to 39 | 846 | 7.7% | 7.9% | 648 | 7.3% | 7.5% | +198 | +0.4pp |
| 40 to 44 | 712 | 6.5% | 6.9% | 652 | 7.4% | 7.6% | +60 | -0.9pp |
| 45 to 49 | 703 | 6.4% | 7.0% | 630 | 7.1% | 7.4% | +73 | -0.7pp |
| 50 to 54 | 721 | 6.5% | 6.7% | 527 | 5.9% | 6.2% | +194 | +0.6pp |
| 55 to 59 | 612 | 5.6% | 5.7% | 418 | 4.7% | 5.0% | +194 | +0.9pp |
| 60 to 64 | 509 | 4.6% | 4.7% | 349 | 3.9% | 3.9% | +160 | +0.7pp |
| 65 to 69 | 441 | 4.0% | 3.8% | 373 | 4.2% | 3.5% | +68 | -0.2pp |
| 70 to 74 | 412 | 3.7% | 3.3% | 304 | 3.4% | 2.4% | +108 | +0.3pp |
| 75 to 79 | 317 | 2.9% | 2.2% | 197 | 2.2% | 1.8% | +120 | +0.7pp |
| 80 to 84 | 185 | 1.7% | 1.5% | 117 | 1.3% | 1.2% | +68 | +0.4pp |
| 85 and over | 151 | 1.4% | 1.3% | 127 | 1.4% | 1.0% | +24 | 0.0pp |
| Total | 11,022 | 100.0% | 100.0% | 8,868 | 100.0% | 100.0% | +2,154 | 0.0pp |