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 West Leederville, accounting for 10.9% (473 people). This share was higher than Cambridge (T) (5.2%). Since 2016, the biggest change was in 30 to 34 year olds, which increased by 73 people and 0.7 percentage points.
Section overview
Age structure - Five year age groups
West Leederville - Total persons (Usual residence)
This table summarises five year age groups for West Leederville in 2021 for persons, with comparison against Cambridge (T) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for West Leederville, with comparison markers for Cambridge (T).
0 to 4
2021 count
232
% of total
5.3%
Change from 2016
-0.9pp
232
5.3%
-0.9pp
5 to 9
2021 count
216
% of total
5.0%
Change from 2016
-0.7pp
216
5.0%
-0.7pp
10 to 14
2021 count
210
% of total
4.8%
Change from 2016
+1.1pp
210
4.8%
+1.1pp
15 to 19
2021 count
161
% of total
3.7%
Change from 2016
+0.1pp
161
3.7%
+0.1pp
20 to 24
2021 count
234
% of total
5.4%
Change from 2016
-0.6pp
234
5.4%
-0.6pp
25 to 29
2021 count
397
% of total
9.1%
Change from 2016
-1.8pp
397
9.1%
-1.8pp
30 to 34
2021 count
473
% of total
10.9%
Change from 2016
+0.7pp
473
10.9%
+0.7pp
35 to 39
2021 count
388
% of total
8.9%
Change from 2016
0.0pp
388
8.9%
0.0pp
40 to 44
2021 count
319
% of total
7.4%
Change from 2016
+0.2pp
319
7.4%
+0.2pp
45 to 49
2021 count
297
% of total
6.8%
Change from 2016
+0.3pp
297
6.8%
+0.3pp
50 to 54
2021 count
244
% of total
5.6%
Change from 2016
-0.1pp
244
5.6%
-0.1pp
55 to 59
2021 count
249
% of total
5.7%
Change from 2016
+0.2pp
249
5.7%
+0.2pp
60 to 64
2021 count
240
% of total
5.5%
Change from 2016
0.0pp
240
5.5%
0.0pp
65 to 69
2021 count
224
% of total
5.2%
Change from 2016
+0.3pp
224
5.2%
+0.3pp
70 to 74
2021 count
192
% of total
4.4%
Change from 2016
+1.1pp
192
4.4%
+1.1pp
75 to 79
2021 count
101
% of total
2.3%
Change from 2016
+0.4pp
101
2.3%
+0.4pp
80 to 84
2021 count
71
% of total
1.6%
Change from 2016
-0.2pp
71
1.6%
-0.2pp
85 and over
2021 count
93
% of total
2.1%
Change from 2016
-0.4pp
93
2.1%
-0.4pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-12
-0.9pp
5 to 9
-9
-0.7pp
10 to 14
+66
+1.1pp
15 to 19
+21
+0.1pp
20 to 24
-2
-0.6pp
25 to 29
-29
-1.8pp
30 to 34
+73
+0.7pp
35 to 39
+37
0.0pp
40 to 44
+37
+0.2pp
45 to 49
+44
+0.3pp
50 to 54
+19
-0.1pp
55 to 59
+34
+0.2pp
60 to 64
+26
0.0pp
65 to 69
+31
+0.3pp
70 to 74
+62
+1.1pp
75 to 79
+26
+0.4pp
80 to 84
+1
-0.2pp
85 and over
-7
-0.4pp
Data table
Five year age groups for West Leederville. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Cambridge (T).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Cambridge (T)% | Count | % | Cambridge (T)% | Count | pp | |
| 0 to 4 | 232 | 5.3% | 4.8% | 244 | 6.2% | 5.7% | -12 | -0.9pp |
| 5 to 9 | 216 | 5.0% | 6.7% | 225 | 5.7% | 7.9% | -9 | -0.7pp |
| 10 to 14 | 210 | 4.8% | 8.0% | 144 | 3.7% | 7.5% | +66 | +1.1pp |
| 15 to 19 | 161 | 3.7% | 6.9% | 140 | 3.6% | 6.3% | +21 | +0.1pp |
| 20 to 24 | 234 | 5.4% | 5.1% | 236 | 6.0% | 5.7% | -2 | -0.6pp |
| 25 to 29 | 397 | 9.1% | 4.6% | 426 | 10.9% | 5.3% | -29 | -1.8pp |
| 30 to 34 | 473 | 10.9% | 5.2% | 400 | 10.2% | 5.3% | +73 | +0.7pp |
| 35 to 39 | 388 | 8.9% | 6.2% | 351 | 8.9% | 6.0% | +37 | 0.0pp |
| 40 to 44 | 319 | 7.4% | 6.8% | 282 | 7.2% | 7.5% | +37 | +0.2pp |
| 45 to 49 | 297 | 6.8% | 7.7% | 253 | 6.5% | 8.2% | +44 | +0.3pp |
| 50 to 54 | 244 | 5.6% | 7.5% | 225 | 5.7% | 6.9% | +19 | -0.1pp |
| 55 to 59 | 249 | 5.7% | 6.5% | 215 | 5.5% | 6.5% | +34 | +0.2pp |
| 60 to 64 | 240 | 5.5% | 5.9% | 214 | 5.5% | 5.3% | +26 | 0.0pp |
| 65 to 69 | 224 | 5.2% | 5.0% | 193 | 4.9% | 4.1% | +31 | +0.3pp |
| 70 to 74 | 192 | 4.4% | 4.1% | 130 | 3.3% | 3.3% | +62 | +1.1pp |
| 75 to 79 | 101 | 2.3% | 3.0% | 75 | 1.9% | 2.9% | +26 | +0.4pp |
| 80 to 84 | 71 | 1.6% | 2.5% | 70 | 1.8% | 2.5% | +1 | -0.2pp |
| 85 and over | 93 | 2.1% | 3.4% | 100 | 2.5% | 3.1% | -7 | -0.4pp |
| Total | 4,340 | 100.0% | 100.0% | 3,922 | 100.0% | 100.0% | +418 | 0.0pp |