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, 35 to 39 year olds was the largest age group among residents in Algester, accounting for 9.5% (860 people). This share was higher than Brisbane (C) (8.1%). Since 2016, the biggest change was in 35 to 39 year olds, which increased by 179 people and 1.4 percentage points.
Section overview
Age structure - Five year age groups
Algester - Total persons (Usual residence)
This table summarises five year age groups for Algester 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 Algester, with comparison markers for Brisbane (C).
0 to 4
2021 count
644
% of total
7.1%
Change from 2016
-0.1pp
644
7.1%
-0.1pp
5 to 9
2021 count
730
% of total
8.1%
Change from 2016
+1.0pp
730
8.1%
+1.0pp
10 to 14
2021 count
596
% of total
6.6%
Change from 2016
+1.1pp
596
6.6%
+1.1pp
15 to 19
2021 count
475
% of total
5.3%
Change from 2016
-0.4pp
475
5.3%
-0.4pp
20 to 24
2021 count
475
% of total
5.3%
Change from 2016
-0.4pp
475
5.3%
-0.4pp
25 to 29
2021 count
616
% of total
6.8%
Change from 2016
-0.8pp
616
6.8%
-0.8pp
30 to 34
2021 count
723
% of total
8.0%
Change from 2016
-1.6pp
723
8.0%
-1.6pp
35 to 39
2021 count
860
% of total
9.5%
Change from 2016
+1.4pp
860
9.5%
+1.4pp
40 to 44
2021 count
681
% of total
7.5%
Change from 2016
+0.7pp
681
7.5%
+0.7pp
45 to 49
2021 count
529
% of total
5.9%
Change from 2016
-0.1pp
529
5.9%
-0.1pp
50 to 54
2021 count
486
% of total
5.4%
Change from 2016
+0.1pp
486
5.4%
+0.1pp
55 to 59
2021 count
410
% of total
4.5%
Change from 2016
-1.0pp
410
4.5%
-1.0pp
60 to 64
2021 count
418
% of total
4.6%
Change from 2016
-1.0pp
418
4.6%
-1.0pp
65 to 69
2021 count
437
% of total
4.8%
Change from 2016
-0.3pp
437
4.8%
-0.3pp
70 to 74
2021 count
408
% of total
4.5%
Change from 2016
+0.7pp
408
4.5%
+0.7pp
75 to 79
2021 count
251
% of total
2.8%
Change from 2016
+0.6pp
251
2.8%
+0.6pp
80 to 84
2021 count
161
% of total
1.8%
Change from 2016
+0.4pp
161
1.8%
+0.4pp
85 and over
2021 count
116
% of total
1.3%
Change from 2016
-0.6pp
116
1.3%
-0.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+35
-0.1pp
5 to 9
+135
+1.0pp
10 to 14
+136
+1.1pp
15 to 19
-8
-0.4pp
20 to 24
-2
-0.4pp
25 to 29
-27
-0.8pp
30 to 34
-84
-1.6pp
35 to 39
+179
+1.4pp
40 to 44
+108
+0.7pp
45 to 49
+22
-0.1pp
50 to 54
+35
+0.1pp
55 to 59
-55
-1.0pp
60 to 64
-52
-1.0pp
65 to 69
+10
-0.3pp
70 to 74
+86
+0.7pp
75 to 79
+63
+0.6pp
80 to 84
+41
+0.4pp
85 and over
-45
-0.6pp
Data table
Five year age groups for Algester. 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 | 644 | 7.1% | 5.5% | 609 | 7.2% | 6.0% | +35 | -0.1pp |
| 5 to 9 | 730 | 8.1% | 6.0% | 595 | 7.1% | 6.0% | +135 | +1.0pp |
| 10 to 14 | 596 | 6.6% | 6.0% | 460 | 5.5% | 5.6% | +136 | +1.1pp |
| 15 to 19 | 475 | 5.3% | 6.0% | 483 | 5.7% | 6.2% | -8 | -0.4pp |
| 20 to 24 | 475 | 5.3% | 7.8% | 477 | 5.7% | 8.7% | -2 | -0.4pp |
| 25 to 29 | 616 | 6.8% | 8.4% | 643 | 7.6% | 8.8% | -27 | -0.8pp |
| 30 to 34 | 723 | 8.0% | 8.3% | 807 | 9.6% | 8.5% | -84 | -1.6pp |
| 35 to 39 | 860 | 9.5% | 8.1% | 681 | 8.1% | 7.4% | +179 | +1.4pp |
| 40 to 44 | 681 | 7.5% | 7.1% | 573 | 6.8% | 7.3% | +108 | +0.7pp |
| 45 to 49 | 529 | 5.9% | 6.8% | 507 | 6.0% | 6.9% | +22 | -0.1pp |
| 50 to 54 | 486 | 5.4% | 6.3% | 451 | 5.3% | 6.1% | +35 | +0.1pp |
| 55 to 59 | 410 | 4.5% | 5.5% | 465 | 5.5% | 5.4% | -55 | -1.0pp |
| 60 to 64 | 418 | 4.6% | 4.8% | 470 | 5.6% | 4.6% | -52 | -1.0pp |
| 65 to 69 | 437 | 4.8% | 4.0% | 427 | 5.1% | 4.0% | +10 | -0.3pp |
| 70 to 74 | 408 | 4.5% | 3.5% | 322 | 3.8% | 2.9% | +86 | +0.7pp |
| 75 to 79 | 251 | 2.8% | 2.5% | 188 | 2.2% | 2.2% | +63 | +0.6pp |
| 80 to 84 | 161 | 1.8% | 1.7% | 120 | 1.4% | 1.6% | +41 | +0.4pp |
| 85 and over | 116 | 1.3% | 1.8% | 161 | 1.9% | 1.8% | -45 | -0.6pp |
| Total | 9,020 | 100.0% | 100.0% | 8,433 | 100.0% | 100.0% | +587 | 0.0pp |