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 Rocklea (Qld), accounting for 11.4% (191 people). This share was higher than Brisbane (C) (8.4%). Since 2016, the biggest change was in 40 to 44 year olds, which increased by 37 people and 2 percentage points.
Section overview
Age structure - Five year age groups
Rocklea (Qld) - Total persons (Usual residence)
This table summarises five year age groups for Rocklea (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 Rocklea (Qld), with comparison markers for Brisbane (C).
0 to 4
2021 count
93
% of total
5.6%
Change from 2016
-1.1pp
93
5.6%
-1.1pp
5 to 9
2021 count
101
% of total
6.0%
Change from 2016
+1.4pp
101
6.0%
+1.4pp
10 to 14
2021 count
63
% of total
3.8%
Change from 2016
-0.1pp
63
3.8%
-0.1pp
15 to 19
2021 count
60
% of total
3.6%
Change from 2016
-2.0pp
60
3.6%
-2.0pp
20 to 24
2021 count
173
% of total
10.3%
Change from 2016
+0.9pp
173
10.3%
+0.9pp
25 to 29
2021 count
191
% of total
11.4%
Change from 2016
+1.1pp
191
11.4%
+1.1pp
30 to 34
2021 count
177
% of total
10.6%
Change from 2016
+0.9pp
177
10.6%
+0.9pp
35 to 39
2021 count
161
% of total
9.6%
Change from 2016
+0.8pp
161
9.6%
+0.8pp
40 to 44
2021 count
119
% of total
7.1%
Change from 2016
+2.0pp
119
7.1%
+2.0pp
45 to 49
2021 count
82
% of total
4.9%
Change from 2016
-1.6pp
82
4.9%
-1.6pp
50 to 54
2021 count
96
% of total
5.7%
Change from 2016
-0.7pp
96
5.7%
-0.7pp
55 to 59
2021 count
80
% of total
4.8%
Change from 2016
-0.3pp
80
4.8%
-0.3pp
60 to 64
2021 count
73
% of total
4.4%
Change from 2016
+0.7pp
73
4.4%
+0.7pp
65 to 69
2021 count
61
% of total
3.6%
Change from 2016
0.0pp
61
3.6%
0.0pp
70 to 74
2021 count
52
% of total
3.1%
Change from 2016
+1.5pp
52
3.1%
+1.5pp
75 to 79
2021 count
33
% of total
2.0%
Change from 2016
+0.1pp
33
2.0%
+0.1pp
80 to 84
2021 count
21
% of total
1.3%
Change from 2016
-0.6pp
21
1.3%
-0.6pp
85 and over
2021 count
66
% of total
3.9%
Change from 2016
+0.3pp
66
3.9%
+0.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-14
-1.1pp
5 to 9
+28
+1.4pp
10 to 14
0
-0.1pp
15 to 19
-30
-2.0pp
20 to 24
+23
+0.9pp
25 to 29
+26
+1.1pp
30 to 34
+23
+0.9pp
35 to 39
+20
+0.8pp
40 to 44
+37
+2.0pp
45 to 49
-22
-1.6pp
50 to 54
-6
-0.7pp
55 to 59
-1
-0.3pp
60 to 64
+14
+0.7pp
65 to 69
+4
0.0pp
70 to 74
+26
+1.5pp
75 to 79
+3
+0.1pp
80 to 84
-9
-0.6pp
85 and over
+8
+0.3pp
Data table
Five year age groups for Rocklea (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 | 93 | 5.6% | 5.5% | 107 | 6.7% | 6.0% | -14 | -1.1pp |
| 5 to 9 | 101 | 6.0% | 6.0% | 73 | 4.6% | 6.0% | +28 | +1.4pp |
| 10 to 14 | 63 | 3.8% | 6.0% | 63 | 3.9% | 5.6% | 0 | -0.1pp |
| 15 to 19 | 60 | 3.6% | 6.0% | 90 | 5.6% | 6.2% | -30 | -2.0pp |
| 20 to 24 | 173 | 10.3% | 7.8% | 150 | 9.4% | 8.7% | +23 | +0.9pp |
| 25 to 29 | 191 | 11.4% | 8.4% | 165 | 10.3% | 8.8% | +26 | +1.1pp |
| 30 to 34 | 177 | 10.6% | 8.3% | 154 | 9.7% | 8.5% | +23 | +0.9pp |
| 35 to 39 | 161 | 9.6% | 8.1% | 141 | 8.8% | 7.4% | +20 | +0.8pp |
| 40 to 44 | 119 | 7.1% | 7.1% | 82 | 5.1% | 7.3% | +37 | +2.0pp |
| 45 to 49 | 82 | 4.9% | 6.8% | 104 | 6.5% | 6.9% | -22 | -1.6pp |
| 50 to 54 | 96 | 5.7% | 6.3% | 102 | 6.4% | 6.1% | -6 | -0.7pp |
| 55 to 59 | 80 | 4.8% | 5.5% | 81 | 5.1% | 5.4% | -1 | -0.3pp |
| 60 to 64 | 73 | 4.4% | 4.8% | 59 | 3.7% | 4.6% | +14 | +0.7pp |
| 65 to 69 | 61 | 3.6% | 4.0% | 57 | 3.6% | 4.0% | +4 | 0.0pp |
| 70 to 74 | 52 | 3.1% | 3.5% | 26 | 1.6% | 2.9% | +26 | +1.5pp |
| 75 to 79 | 33 | 2.0% | 2.5% | 30 | 1.9% | 2.2% | +3 | +0.1pp |
| 80 to 84 | 21 | 1.3% | 1.7% | 30 | 1.9% | 1.6% | -9 | -0.6pp |
| 85 and over | 66 | 3.9% | 1.8% | 58 | 3.6% | 1.8% | +8 | +0.3pp |
| Total | 1,672 | 100.0% | 100.0% | 1,595 | 100.0% | 100.0% | +77 | 0.0pp |