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 Bayswater (Vic.), accounting for 8.9% (1,097 people). This share was higher than Knox (C) (6.7%). Since 2016, the biggest change was in 35 to 39 year olds, which increased by 196 people and 1.3 percentage points.
Section overview
Age structure - Five year age groups
Bayswater (Vic.) - Total persons (Usual residence)
This table summarises five year age groups for Bayswater (Vic.) in 2021 for persons, with comparison against Knox (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Bayswater (Vic.), with comparison markers for Knox (C).
0 to 4
2021 count
708
% of total
5.8%
Change from 2016
-0.9pp
708
5.8%
-0.9pp
5 to 9
2021 count
701
% of total
5.7%
Change from 2016
+0.2pp
701
5.7%
+0.2pp
10 to 14
2021 count
593
% of total
4.8%
Change from 2016
0.0pp
593
4.8%
0.0pp
15 to 19
2021 count
558
% of total
4.6%
Change from 2016
-0.3pp
558
4.6%
-0.3pp
20 to 24
2021 count
717
% of total
5.8%
Change from 2016
-0.4pp
717
5.8%
-0.4pp
25 to 29
2021 count
910
% of total
7.4%
Change from 2016
-0.7pp
910
7.4%
-0.7pp
30 to 34
2021 count
1,097
% of total
8.9%
Change from 2016
-0.1pp
1,097
8.9%
-0.1pp
35 to 39
2021 count
1,088
% of total
8.9%
Change from 2016
+1.3pp
1,088
8.9%
+1.3pp
40 to 44
2021 count
852
% of total
6.9%
Change from 2016
+0.4pp
852
6.9%
+0.4pp
45 to 49
2021 count
730
% of total
6.0%
Change from 2016
-0.5pp
730
6.0%
-0.5pp
50 to 54
2021 count
757
% of total
6.2%
Change from 2016
+0.2pp
757
6.2%
+0.2pp
55 to 59
2021 count
680
% of total
5.5%
Change from 2016
-0.2pp
680
5.5%
-0.2pp
60 to 64
2021 count
636
% of total
5.2%
Change from 2016
+0.5pp
636
5.2%
+0.5pp
65 to 69
2021 count
540
% of total
4.4%
Change from 2016
-0.9pp
540
4.4%
-0.9pp
70 to 74
2021 count
561
% of total
4.6%
Change from 2016
+0.3pp
561
4.6%
+0.3pp
75 to 79
2021 count
417
% of total
3.4%
Change from 2016
-0.2pp
417
3.4%
-0.2pp
80 to 84
2021 count
336
% of total
2.7%
Change from 2016
+0.4pp
336
2.7%
+0.4pp
85 and over
2021 count
355
% of total
2.9%
Change from 2016
+0.4pp
355
2.9%
+0.4pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-80
-0.9pp
5 to 9
+53
+0.2pp
10 to 14
+24
0.0pp
15 to 19
-15
-0.3pp
20 to 24
-9
-0.4pp
25 to 29
-42
-0.7pp
30 to 34
+34
-0.1pp
35 to 39
+196
+1.3pp
40 to 44
+90
+0.4pp
45 to 49
-35
-0.5pp
50 to 54
+54
+0.2pp
55 to 59
+9
-0.2pp
60 to 64
+81
+0.5pp
65 to 69
-89
-0.9pp
70 to 74
+51
+0.3pp
75 to 79
-12
-0.2pp
80 to 84
+65
+0.4pp
85 and over
+58
+0.4pp
Data table
Five year age groups for Bayswater (Vic.). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Knox (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Knox (C)% | Count | % | Knox (C)% | Count | pp | |
| 0 to 4 | 708 | 5.8% | 5.3% | 788 | 6.7% | 5.9% | -80 | -0.9pp |
| 5 to 9 | 701 | 5.7% | 5.9% | 648 | 5.5% | 5.9% | +53 | +0.2pp |
| 10 to 14 | 593 | 4.8% | 5.8% | 569 | 4.8% | 5.8% | +24 | 0.0pp |
| 15 to 19 | 558 | 4.6% | 5.9% | 573 | 4.9% | 6.4% | -15 | -0.3pp |
| 20 to 24 | 717 | 5.8% | 6.1% | 726 | 6.2% | 6.6% | -9 | -0.4pp |
| 25 to 29 | 910 | 7.4% | 6.0% | 952 | 8.1% | 6.4% | -42 | -0.7pp |
| 30 to 34 | 1,097 | 8.9% | 6.7% | 1,063 | 9.0% | 6.8% | +34 | -0.1pp |
| 35 to 39 | 1,088 | 8.9% | 7.2% | 892 | 7.6% | 6.7% | +196 | +1.3pp |
| 40 to 44 | 852 | 6.9% | 6.8% | 762 | 6.5% | 6.8% | +90 | +0.4pp |
| 45 to 49 | 730 | 6.0% | 6.7% | 765 | 6.5% | 7.2% | -35 | -0.5pp |
| 50 to 54 | 757 | 6.2% | 6.8% | 703 | 6.0% | 7.2% | +54 | +0.2pp |
| 55 to 59 | 680 | 5.5% | 6.7% | 671 | 5.7% | 6.8% | +9 | -0.2pp |
| 60 to 64 | 636 | 5.2% | 6.2% | 555 | 4.7% | 6.1% | +81 | +0.5pp |
| 65 to 69 | 540 | 4.4% | 5.4% | 629 | 5.3% | 5.2% | -89 | -0.9pp |
| 70 to 74 | 561 | 4.6% | 4.6% | 510 | 4.3% | 3.6% | +51 | +0.3pp |
| 75 to 79 | 417 | 3.4% | 3.2% | 429 | 3.6% | 2.7% | -12 | -0.2pp |
| 80 to 84 | 336 | 2.7% | 2.4% | 271 | 2.3% | 1.9% | +65 | +0.4pp |
| 85 and over | 355 | 2.9% | 2.2% | 297 | 2.5% | 2.0% | +58 | +0.4pp |
| Total | 12,262 | 100.0% | 100.0% | 11,758 | 100.0% | 100.0% | +504 | 0.0pp |