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, 20 to 24 year olds was the largest age group among residents in Kooyong, accounting for 8.3% (70 people). This share was higher than Stonnington (C) (7.8%). Since 2016, the biggest change was in 30 to 34 year olds, which increased by 31 people and 3.6 percentage points.
Section overview
Age structure - Five year age groups
Kooyong - Total persons (Usual residence)
This table summarises five year age groups for Kooyong in 2021 for persons, with comparison against Stonnington (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Kooyong, with comparison markers for Stonnington (C).
0 to 4
2021 count
33
% of total
3.9%
Change from 2016
+2.3pp
33
3.9%
+2.3pp
5 to 9
2021 count
29
% of total
3.4%
Change from 2016
-1.9pp
29
3.4%
-1.9pp
10 to 14
2021 count
53
% of total
6.3%
Change from 2016
+0.1pp
53
6.3%
+0.1pp
15 to 19
2021 count
58
% of total
6.9%
Change from 2016
-0.7pp
58
6.9%
-0.7pp
20 to 24
2021 count
70
% of total
8.3%
Change from 2016
+0.2pp
70
8.3%
+0.2pp
25 to 29
2021 count
61
% of total
7.2%
Change from 2016
+0.7pp
61
7.2%
+0.7pp
30 to 34
2021 count
52
% of total
6.2%
Change from 2016
+3.6pp
52
6.2%
+3.6pp
35 to 39
2021 count
43
% of total
5.1%
Change from 2016
-0.5pp
43
5.1%
-0.5pp
40 to 44
2021 count
45
% of total
5.3%
Change from 2016
-0.3pp
45
5.3%
-0.3pp
45 to 49
2021 count
43
% of total
5.1%
Change from 2016
-2.2pp
43
5.1%
-2.2pp
50 to 54
2021 count
68
% of total
8.1%
Change from 2016
+2.6pp
68
8.1%
+2.6pp
55 to 59
2021 count
60
% of total
7.1%
Change from 2016
+1.0pp
60
7.1%
+1.0pp
60 to 64
2021 count
49
% of total
5.8%
Change from 2016
+0.3pp
49
5.8%
+0.3pp
65 to 69
2021 count
43
% of total
5.1%
Change from 2016
-2.6pp
43
5.1%
-2.6pp
70 to 74
2021 count
58
% of total
6.9%
Change from 2016
+1.5pp
58
6.9%
+1.5pp
75 to 79
2021 count
30
% of total
3.6%
Change from 2016
-0.4pp
30
3.6%
-0.4pp
80 to 84
2021 count
36
% of total
4.3%
Change from 2016
+1.0pp
36
4.3%
+1.0pp
85 and over
2021 count
36
% of total
4.3%
Change from 2016
+1.2pp
36
4.3%
+1.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+20
+2.3pp
5 to 9
-14
-1.9pp
10 to 14
+2
+0.1pp
15 to 19
-4
-0.7pp
20 to 24
+4
+0.2pp
25 to 29
+8
+0.7pp
30 to 34
+31
+3.6pp
35 to 39
-3
-0.5pp
40 to 44
-1
-0.3pp
45 to 49
-17
-2.2pp
50 to 54
+23
+2.6pp
55 to 59
+10
+1.0pp
60 to 64
+4
+0.3pp
65 to 69
-20
-2.6pp
70 to 74
+14
+1.5pp
75 to 79
-3
-0.4pp
80 to 84
+9
+1.0pp
85 and over
+11
+1.2pp
Data table
Five year age groups for Kooyong. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Stonnington (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Stonnington (C)% | Count | % | Stonnington (C)% | Count | pp | |
| 0 to 4 | 33 | 3.9% | 3.8% | 13 | 1.6% | 4.2% | +20 | +2.3pp |
| 5 to 9 | 29 | 3.4% | 3.7% | 43 | 5.3% | 4.1% | -14 | -1.9pp |
| 10 to 14 | 53 | 6.3% | 4.0% | 51 | 6.2% | 4.1% | +2 | +0.1pp |
| 15 to 19 | 58 | 6.9% | 4.4% | 62 | 7.6% | 4.5% | -4 | -0.7pp |
| 20 to 24 | 70 | 8.3% | 7.8% | 66 | 8.1% | 9.2% | +4 | +0.2pp |
| 25 to 29 | 61 | 7.2% | 12.0% | 53 | 6.5% | 12.8% | +8 | +0.7pp |
| 30 to 34 | 52 | 6.2% | 10.7% | 21 | 2.6% | 10.9% | +31 | +3.6pp |
| 35 to 39 | 43 | 5.1% | 8.3% | 46 | 5.6% | 7.4% | -3 | -0.5pp |
| 40 to 44 | 45 | 5.3% | 6.1% | 46 | 5.6% | 6.2% | -1 | -0.3pp |
| 45 to 49 | 43 | 5.1% | 5.9% | 60 | 7.3% | 6.2% | -17 | -2.2pp |
| 50 to 54 | 68 | 8.1% | 6.2% | 45 | 5.5% | 5.5% | +23 | +2.6pp |
| 55 to 59 | 60 | 7.1% | 5.3% | 50 | 6.1% | 5.1% | +10 | +1.0pp |
| 60 to 64 | 49 | 5.8% | 4.9% | 45 | 5.5% | 4.6% | +4 | +0.3pp |
| 65 to 69 | 43 | 5.1% | 4.4% | 63 | 7.7% | 4.4% | -20 | -2.6pp |
| 70 to 74 | 58 | 6.9% | 4.2% | 44 | 5.4% | 3.4% | +14 | +1.5pp |
| 75 to 79 | 30 | 3.6% | 3.3% | 33 | 4.0% | 2.9% | -3 | -0.4pp |
| 80 to 84 | 36 | 4.3% | 2.5% | 27 | 3.3% | 2.1% | +9 | +1.0pp |
| 85 and over | 36 | 4.3% | 2.6% | 25 | 3.1% | 2.4% | +11 | +1.2pp |
| Total | 842 | 100.0% | 100.0% | 817 | 100.0% | 100.0% | +25 | 0.0pp |