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 Bald Hills (Qld), accounting for 8.5% (596 people). This share was similar to Brisbane (C) (8.3%). Since 2016, the biggest change was in 10 to 14 year olds, which increased by 86 people and 0.8 percentage points.
Section overview
Age structure - Five year age groups
Bald Hills (Qld) - Total persons (Usual residence)
This table summarises five year age groups for Bald Hills (Qld) 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 Bald Hills (Qld), with comparison markers for Brisbane (C).
0 to 4
2021 count
474
% of total
6.8%
Change from 2016
-0.6pp
474
6.8%
-0.6pp
5 to 9
2021 count
516
% of total
7.4%
Change from 2016
+0.2pp
516
7.4%
+0.2pp
10 to 14
2021 count
474
% of total
6.8%
Change from 2016
+0.8pp
474
6.8%
+0.8pp
15 to 19
2021 count
383
% of total
5.5%
Change from 2016
0.0pp
383
5.5%
0.0pp
20 to 24
2021 count
379
% of total
5.4%
Change from 2016
-0.9pp
379
5.4%
-0.9pp
25 to 29
2021 count
503
% of total
7.2%
Change from 2016
+0.4pp
503
7.2%
+0.4pp
30 to 34
2021 count
596
% of total
8.5%
Change from 2016
+0.1pp
596
8.5%
+0.1pp
35 to 39
2021 count
555
% of total
7.9%
Change from 2016
+0.5pp
555
7.9%
+0.5pp
40 to 44
2021 count
500
% of total
7.1%
Change from 2016
-0.4pp
500
7.1%
-0.4pp
45 to 49
2021 count
447
% of total
6.4%
Change from 2016
-0.7pp
447
6.4%
-0.7pp
50 to 54
2021 count
448
% of total
6.4%
Change from 2016
+0.2pp
448
6.4%
+0.2pp
55 to 59
2021 count
379
% of total
5.4%
Change from 2016
-0.3pp
379
5.4%
-0.3pp
60 to 64
2021 count
363
% of total
5.2%
Change from 2016
-0.2pp
363
5.2%
-0.2pp
65 to 69
2021 count
321
% of total
4.6%
Change from 2016
-0.2pp
321
4.6%
-0.2pp
70 to 74
2021 count
264
% of total
3.8%
Change from 2016
+0.3pp
264
3.8%
+0.3pp
75 to 79
2021 count
200
% of total
2.9%
Change from 2016
+1.0pp
200
2.9%
+1.0pp
80 to 84
2021 count
103
% of total
1.5%
Change from 2016
0.0pp
103
1.5%
0.0pp
85 and over
2021 count
99
% of total
1.4%
Change from 2016
-0.1pp
99
1.4%
-0.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-8
-0.6pp
5 to 9
+50
+0.2pp
10 to 14
+86
+0.8pp
15 to 19
+24
0.0pp
20 to 24
-29
-0.9pp
25 to 29
+59
+0.4pp
30 to 34
+50
+0.1pp
35 to 39
+75
+0.5pp
40 to 44
+15
-0.4pp
45 to 49
-16
-0.7pp
50 to 54
+45
+0.2pp
55 to 59
+7
-0.3pp
60 to 64
+14
-0.2pp
65 to 69
+10
-0.2pp
70 to 74
+37
+0.3pp
75 to 79
+74
+1.0pp
80 to 84
+8
0.0pp
85 and over
+2
-0.1pp
Data table
Five year age groups for Bald Hills (Qld). 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 | 474 | 6.8% | 5.5% | 482 | 7.4% | 6.0% | -8 | -0.6pp |
| 5 to 9 | 516 | 7.4% | 6.0% | 466 | 7.2% | 6.0% | +50 | +0.2pp |
| 10 to 14 | 474 | 6.8% | 6.0% | 388 | 6.0% | 5.6% | +86 | +0.8pp |
| 15 to 19 | 383 | 5.5% | 6.0% | 359 | 5.5% | 6.2% | +24 | 0.0pp |
| 20 to 24 | 379 | 5.4% | 7.8% | 408 | 6.3% | 8.7% | -29 | -0.9pp |
| 25 to 29 | 503 | 7.2% | 8.4% | 444 | 6.8% | 8.8% | +59 | +0.4pp |
| 30 to 34 | 596 | 8.5% | 8.3% | 546 | 8.4% | 8.5% | +50 | +0.1pp |
| 35 to 39 | 555 | 7.9% | 8.1% | 480 | 7.4% | 7.4% | +75 | +0.5pp |
| 40 to 44 | 500 | 7.1% | 7.1% | 485 | 7.5% | 7.3% | +15 | -0.4pp |
| 45 to 49 | 447 | 6.4% | 6.8% | 463 | 7.1% | 6.9% | -16 | -0.7pp |
| 50 to 54 | 448 | 6.4% | 6.3% | 403 | 6.2% | 6.1% | +45 | +0.2pp |
| 55 to 59 | 379 | 5.4% | 5.5% | 372 | 5.7% | 5.4% | +7 | -0.3pp |
| 60 to 64 | 363 | 5.2% | 4.8% | 349 | 5.4% | 4.6% | +14 | -0.2pp |
| 65 to 69 | 321 | 4.6% | 4.0% | 311 | 4.8% | 4.0% | +10 | -0.2pp |
| 70 to 74 | 264 | 3.8% | 3.5% | 227 | 3.5% | 2.9% | +37 | +0.3pp |
| 75 to 79 | 200 | 2.9% | 2.5% | 126 | 1.9% | 2.2% | +74 | +1.0pp |
| 80 to 84 | 103 | 1.5% | 1.7% | 95 | 1.5% | 1.6% | +8 | 0.0pp |
| 85 and over | 99 | 1.4% | 1.8% | 97 | 1.5% | 1.8% | +2 | -0.1pp |
| Total | 7,000 | 100.0% | 100.0% | 6,502 | 100.0% | 100.0% | +498 | 0.0pp |