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 Robertson (Qld), accounting for 10.3% (489 people). This share was higher than Brisbane (C) (8.4%). Since 2016, the biggest change was in 20 to 24 year olds, which decreased by 247 people and 4.6 percentage points.
Section overview
Age structure - Five year age groups
Robertson (Qld) - Total persons (Usual residence)
This table summarises five year age groups for Robertson (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 Robertson (Qld), with comparison markers for Brisbane (C).
0 to 4
2021 count
215
% of total
4.5%
Change from 2016
-0.2pp
215
4.5%
-0.2pp
5 to 9
2021 count
246
% of total
5.2%
Change from 2016
+0.2pp
246
5.2%
+0.2pp
10 to 14
2021 count
210
% of total
4.4%
Change from 2016
+0.1pp
210
4.4%
+0.1pp
15 to 19
2021 count
257
% of total
5.4%
Change from 2016
-0.6pp
257
5.4%
-0.6pp
20 to 24
2021 count
423
% of total
8.9%
Change from 2016
-4.6pp
423
8.9%
-4.6pp
25 to 29
2021 count
489
% of total
10.3%
Change from 2016
-1.2pp
489
10.3%
-1.2pp
30 to 34
2021 count
347
% of total
7.3%
Change from 2016
-0.8pp
347
7.3%
-0.8pp
35 to 39
2021 count
367
% of total
7.7%
Change from 2016
+1.2pp
367
7.7%
+1.2pp
40 to 44
2021 count
291
% of total
6.1%
Change from 2016
+0.9pp
291
6.1%
+0.9pp
45 to 49
2021 count
236
% of total
5.0%
Change from 2016
-0.6pp
236
5.0%
-0.6pp
50 to 54
2021 count
274
% of total
5.8%
Change from 2016
+1.0pp
274
5.8%
+1.0pp
55 to 59
2021 count
240
% of total
5.1%
Change from 2016
+0.4pp
240
5.1%
+0.4pp
60 to 64
2021 count
222
% of total
4.7%
Change from 2016
+0.3pp
222
4.7%
+0.3pp
65 to 69
2021 count
221
% of total
4.7%
Change from 2016
+0.1pp
221
4.7%
+0.1pp
70 to 74
2021 count
243
% of total
5.1%
Change from 2016
+1.6pp
243
5.1%
+1.6pp
75 to 79
2021 count
187
% of total
3.9%
Change from 2016
+1.0pp
187
3.9%
+1.0pp
80 to 84
2021 count
159
% of total
3.3%
Change from 2016
+1.1pp
159
3.3%
+1.1pp
85 and over
2021 count
141
% of total
3.0%
Change from 2016
+0.8pp
141
3.0%
+0.8pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-17
-0.2pp
5 to 9
-1
+0.2pp
10 to 14
-5
+0.1pp
15 to 19
-40
-0.6pp
20 to 24
-247
-4.6pp
25 to 29
-82
-1.2pp
30 to 34
-55
-0.8pp
35 to 39
+46
+1.2pp
40 to 44
+30
+0.9pp
45 to 49
-41
-0.6pp
50 to 54
+33
+1.0pp
55 to 59
+8
+0.4pp
60 to 64
+5
+0.3pp
65 to 69
-9
+0.1pp
70 to 74
+68
+1.6pp
75 to 79
+42
+1.0pp
80 to 84
+51
+1.1pp
85 and over
+31
+0.8pp
Data table
Five year age groups for Robertson (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 | 215 | 4.5% | 5.5% | 232 | 4.7% | 6.0% | -17 | -0.2pp |
| 5 to 9 | 246 | 5.2% | 6.0% | 247 | 5.0% | 6.0% | -1 | +0.2pp |
| 10 to 14 | 210 | 4.4% | 6.0% | 215 | 4.3% | 5.6% | -5 | +0.1pp |
| 15 to 19 | 257 | 5.4% | 6.0% | 297 | 6.0% | 6.2% | -40 | -0.6pp |
| 20 to 24 | 423 | 8.9% | 7.8% | 670 | 13.5% | 8.7% | -247 | -4.6pp |
| 25 to 29 | 489 | 10.3% | 8.4% | 571 | 11.5% | 8.8% | -82 | -1.2pp |
| 30 to 34 | 347 | 7.3% | 8.3% | 402 | 8.1% | 8.5% | -55 | -0.8pp |
| 35 to 39 | 367 | 7.7% | 8.1% | 321 | 6.5% | 7.4% | +46 | +1.2pp |
| 40 to 44 | 291 | 6.1% | 7.1% | 261 | 5.2% | 7.3% | +30 | +0.9pp |
| 45 to 49 | 236 | 5.0% | 6.8% | 277 | 5.6% | 6.9% | -41 | -0.6pp |
| 50 to 54 | 274 | 5.8% | 6.3% | 241 | 4.8% | 6.1% | +33 | +1.0pp |
| 55 to 59 | 240 | 5.1% | 5.5% | 232 | 4.7% | 5.4% | +8 | +0.4pp |
| 60 to 64 | 222 | 4.7% | 4.8% | 217 | 4.4% | 4.6% | +5 | +0.3pp |
| 65 to 69 | 221 | 4.7% | 4.0% | 230 | 4.6% | 4.0% | -9 | +0.1pp |
| 70 to 74 | 243 | 5.1% | 3.5% | 175 | 3.5% | 2.9% | +68 | +1.6pp |
| 75 to 79 | 187 | 3.9% | 2.5% | 145 | 2.9% | 2.2% | +42 | +1.0pp |
| 80 to 84 | 159 | 3.3% | 1.7% | 108 | 2.2% | 1.6% | +51 | +1.1pp |
| 85 and over | 141 | 3.0% | 1.8% | 110 | 2.2% | 1.8% | +31 | +0.8pp |
| Total | 4,749 | 100.0% | 100.0% | 4,973 | 100.0% | 100.0% | -224 | 0.0pp |