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 Westlake, accounting for 8% (365 people). This share was higher than Brisbane (C) (4.8%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 87 people and 1.9 percentage points.
Section overview
Age structure - Five year age groups
Westlake - Total persons (Usual residence)
This table summarises five year age groups for Westlake in 2021 for persons, with comparison against Brisbane (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Westlake, with comparison markers for Brisbane (C).
0 to 4
2021 count
220
% of total
4.8%
Change from 2016
-0.4pp
220
4.8%
-0.4pp
5 to 9
2021 count
315
% of total
6.9%
Change from 2016
+0.3pp
315
6.9%
+0.3pp
10 to 14
2021 count
336
% of total
7.4%
Change from 2016
+0.5pp
336
7.4%
+0.5pp
15 to 19
2021 count
300
% of total
6.6%
Change from 2016
-1.7pp
300
6.6%
-1.7pp
20 to 24
2021 count
248
% of total
5.5%
Change from 2016
-1.1pp
248
5.5%
-1.1pp
25 to 29
2021 count
175
% of total
3.8%
Change from 2016
-0.2pp
175
3.8%
-0.2pp
30 to 34
2021 count
198
% of total
4.4%
Change from 2016
-0.1pp
198
4.4%
-0.1pp
35 to 39
2021 count
280
% of total
6.2%
Change from 2016
+0.9pp
280
6.2%
+0.9pp
40 to 44
2021 count
300
% of total
6.6%
Change from 2016
+0.2pp
300
6.6%
+0.2pp
45 to 49
2021 count
321
% of total
7.1%
Change from 2016
-0.4pp
321
7.1%
-0.4pp
50 to 54
2021 count
321
% of total
7.1%
Change from 2016
-1.5pp
321
7.1%
-1.5pp
55 to 59
2021 count
352
% of total
7.7%
Change from 2016
-0.7pp
352
7.7%
-0.7pp
60 to 64
2021 count
365
% of total
8.0%
Change from 2016
+0.4pp
365
8.0%
+0.4pp
65 to 69
2021 count
305
% of total
6.7%
Change from 2016
0.0pp
305
6.7%
0.0pp
70 to 74
2021 count
266
% of total
5.9%
Change from 2016
+1.9pp
266
5.9%
+1.9pp
75 to 79
2021 count
135
% of total
3.0%
Change from 2016
+1.0pp
135
3.0%
+1.0pp
80 to 84
2021 count
67
% of total
1.5%
Change from 2016
+0.3pp
67
1.5%
+0.3pp
85 and over
2021 count
54
% of total
1.2%
Change from 2016
+0.5pp
54
1.2%
+0.5pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-10
-0.4pp
5 to 9
+22
+0.3pp
10 to 14
+28
+0.5pp
15 to 19
-67
-1.7pp
20 to 24
-46
-1.1pp
25 to 29
-4
-0.2pp
30 to 34
-2
-0.1pp
35 to 39
+43
+0.9pp
40 to 44
+14
+0.2pp
45 to 49
-13
-0.4pp
50 to 54
-61
-1.5pp
55 to 59
-19
-0.7pp
60 to 64
+26
+0.4pp
65 to 69
+7
0.0pp
70 to 74
+87
+1.9pp
75 to 79
+47
+1.0pp
80 to 84
+13
+0.3pp
85 and over
+23
+0.5pp
Data table
Five year age groups for Westlake. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Brisbane (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Brisbane (C)% | Count | % | Brisbane (C)% | Count | pp | |
| 0 to 4 | 220 | 4.8% | 5.5% | 230 | 5.2% | 6.0% | -10 | -0.4pp |
| 5 to 9 | 315 | 6.9% | 6.0% | 293 | 6.6% | 6.0% | +22 | +0.3pp |
| 10 to 14 | 336 | 7.4% | 6.0% | 308 | 6.9% | 5.6% | +28 | +0.5pp |
| 15 to 19 | 300 | 6.6% | 6.0% | 367 | 8.3% | 6.2% | -67 | -1.7pp |
| 20 to 24 | 248 | 5.5% | 7.8% | 294 | 6.6% | 8.7% | -46 | -1.1pp |
| 25 to 29 | 175 | 3.8% | 8.4% | 179 | 4.0% | 8.8% | -4 | -0.2pp |
| 30 to 34 | 198 | 4.4% | 8.3% | 200 | 4.5% | 8.5% | -2 | -0.1pp |
| 35 to 39 | 280 | 6.2% | 8.1% | 237 | 5.3% | 7.4% | +43 | +0.9pp |
| 40 to 44 | 300 | 6.6% | 7.1% | 286 | 6.4% | 7.3% | +14 | +0.2pp |
| 45 to 49 | 321 | 7.1% | 6.8% | 334 | 7.5% | 6.9% | -13 | -0.4pp |
| 50 to 54 | 321 | 7.1% | 6.3% | 382 | 8.6% | 6.1% | -61 | -1.5pp |
| 55 to 59 | 352 | 7.7% | 5.5% | 371 | 8.4% | 5.4% | -19 | -0.7pp |
| 60 to 64 | 365 | 8.0% | 4.8% | 339 | 7.6% | 4.6% | +26 | +0.4pp |
| 65 to 69 | 305 | 6.7% | 4.0% | 298 | 6.7% | 4.0% | +7 | 0.0pp |
| 70 to 74 | 266 | 5.9% | 3.5% | 179 | 4.0% | 2.9% | +87 | +1.9pp |
| 75 to 79 | 135 | 3.0% | 2.5% | 88 | 2.0% | 2.2% | +47 | +1.0pp |
| 80 to 84 | 67 | 1.5% | 1.7% | 54 | 1.2% | 1.6% | +13 | +0.3pp |
| 85 and over | 54 | 1.2% | 1.8% | 31 | 0.7% | 1.8% | +23 | +0.5pp |
| Total | 4,547 | 100.0% | 100.0% | 4,443 | 100.0% | 100.0% | +104 | 0.0pp |