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, 25 to 29 year olds was the largest age group among residents in Yalgoo (S), accounting for 16.5% (56 people). This share was higher than Regional WA (5.9%). Since 2016, the biggest change was in 45 to 49 year olds, which decreased by 22 people and 6.6 percentage points.
Section overview
Age structure - Five year age groups
Yalgoo (S) - Total persons (Usual residence)
This table summarises five year age groups for Yalgoo (S) in 2021 for persons, with comparison against Regional WA and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Yalgoo (S), with comparison markers for Regional WA.
0 to 4
2021 count
13
% of total
3.8%
Change from 2016
+2.0pp
13
3.8%
+2.0pp
5 to 9
2021 count
0
% of total
0.0%
Change from 2016
-4.5pp
0
0.0%
-4.5pp
10 to 14
2021 count
0
% of total
0.0%
Change from 2016
-1.8pp
0
0.0%
-1.8pp
15 to 19
2021 count
6
% of total
1.8%
Change from 2016
-3.8pp
6
1.8%
-3.8pp
20 to 24
2021 count
30
% of total
8.8%
Change from 2016
+4.1pp
30
8.8%
+4.1pp
25 to 29
2021 count
56
% of total
16.5%
Change from 2016
+6.1pp
56
16.5%
+6.1pp
30 to 34
2021 count
47
% of total
13.8%
Change from 2016
+4.6pp
47
13.8%
+4.6pp
35 to 39
2021 count
25
% of total
7.4%
Change from 2016
+0.6pp
25
7.4%
+0.6pp
40 to 44
2021 count
22
% of total
6.5%
Change from 2016
-1.2pp
22
6.5%
-1.2pp
45 to 49
2021 count
12
% of total
3.5%
Change from 2016
-6.6pp
12
3.5%
-6.6pp
50 to 54
2021 count
33
% of total
9.7%
Change from 2016
+1.1pp
33
9.7%
+1.1pp
55 to 59
2021 count
19
% of total
5.6%
Change from 2016
-4.5pp
19
5.6%
-4.5pp
60 to 64
2021 count
25
% of total
7.4%
Change from 2016
-3.0pp
25
7.4%
-3.0pp
65 to 69
2021 count
15
% of total
4.4%
Change from 2016
+1.4pp
15
4.4%
+1.4pp
70 to 74
2021 count
8
% of total
2.4%
Change from 2016
+1.5pp
8
2.4%
+1.5pp
75 to 79
2021 count
0
% of total
0.0%
Change from 2016
-1.8pp
0
0.0%
-1.8pp
80 to 84
2021 count
7
% of total
2.1%
Change from 2016
+0.6pp
7
2.1%
+0.6pp
85 and over
2021 count
4
% of total
1.2%
Change from 2016
+0.3pp
4
1.2%
+0.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+7
+2.0pp
5 to 9
-15
-4.5pp
10 to 14
-6
-1.8pp
15 to 19
-13
-3.8pp
20 to 24
+14
+4.1pp
25 to 29
+21
+6.1pp
30 to 34
+16
+4.6pp
35 to 39
+2
+0.6pp
40 to 44
-4
-1.2pp
45 to 49
-22
-6.6pp
50 to 54
+4
+1.1pp
55 to 59
-15
-4.5pp
60 to 64
-10
-3.0pp
65 to 69
+5
+1.4pp
70 to 74
+5
+1.5pp
75 to 79
-6
-1.8pp
80 to 84
+2
+0.6pp
85 and over
+1
+0.3pp
Data table
Five year age groups for Yalgoo (S). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Regional WA.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional WA% | Count | % | Regional WA% | Count | pp | |
| 0 to 4 | 13 | 3.8% | 6.0% | 6 | 1.8% | 6.6% | +7 | +2.0pp |
| 5 to 9 | 0 | 0.0% | 6.7% | 15 | 4.5% | 7.1% | -15 | -4.5pp |
| 10 to 14 | 0 | 0.0% | 6.7% | 6 | 1.8% | 6.5% | -6 | -1.8pp |
| 15 to 19 | 6 | 1.8% | 5.5% | 19 | 5.6% | 5.7% | -13 | -3.8pp |
| 20 to 24 | 30 | 8.8% | 4.8% | 16 | 4.7% | 5.0% | +14 | +4.1pp |
| 25 to 29 | 56 | 16.5% | 5.9% | 35 | 10.4% | 6.5% | +21 | +6.1pp |
| 30 to 34 | 47 | 13.8% | 6.6% | 31 | 9.2% | 7.1% | +16 | +4.6pp |
| 35 to 39 | 25 | 7.4% | 6.8% | 23 | 6.8% | 6.7% | +2 | +0.6pp |
| 40 to 44 | 22 | 6.5% | 6.4% | 26 | 7.7% | 7.0% | -4 | -1.2pp |
| 45 to 49 | 12 | 3.5% | 6.6% | 34 | 10.1% | 7.2% | -22 | -6.6pp |
| 50 to 54 | 33 | 9.7% | 6.9% | 29 | 8.6% | 7.1% | +4 | +1.1pp |
| 55 to 59 | 19 | 5.6% | 6.8% | 34 | 10.1% | 6.9% | -15 | -4.5pp |
| 60 to 64 | 25 | 7.4% | 6.7% | 35 | 10.4% | 6.0% | -10 | -3.0pp |
| 65 to 69 | 15 | 4.4% | 5.7% | 10 | 3.0% | 5.3% | +5 | +1.4pp |
| 70 to 74 | 8 | 2.4% | 4.9% | 3 | 0.9% | 3.6% | +5 | +1.5pp |
| 75 to 79 | 0 | 0.0% | 3.2% | 6 | 1.8% | 2.6% | -6 | -1.8pp |
| 80 to 84 | 7 | 2.1% | 2.0% | 5 | 1.5% | 1.6% | +2 | +0.6pp |
| 85 and over | 4 | 1.2% | 1.7% | 3 | 0.9% | 1.5% | +1 | +0.3pp |
| Total | 340 | 100.0% | 100.0% | 337 | 100.0% | 100.0% | +3 | 0.0pp |