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 South Yarra (part), accounting for 18% (4,503 people). This share was higher than Stonnington (C) (12%). Since 2016, the biggest change was in 25 to 29 year olds, which increased by 4,497 people and 14.7 percentage points.
Section overview
Age structure - Five year age groups
South Yarra (part) - Total persons (Usual residence)
This table summarises five year age groups for South Yarra (part) 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 South Yarra (part), with comparison markers for Stonnington (C).
0 to 4
2021 count
693
% of total
2.8%
Change from 2016
-1.6pp
693
2.8%
-1.6pp
5 to 9
2021 count
573
% of total
2.3%
Change from 2016
+0.6pp
573
2.3%
+0.6pp
10 to 14
2021 count
498
% of total
2.0%
Change from 2016
-3.5pp
498
2.0%
-3.5pp
15 to 19
2021 count
751
% of total
3.0%
Change from 2016
-3.1pp
751
3.0%
-3.1pp
20 to 24
2021 count
2,185
% of total
8.7%
Change from 2016
-2.9pp
2,185
8.7%
-2.9pp
25 to 29
2021 count
4,503
% of total
18.0%
Change from 2016
+14.7pp
4,503
18.0%
+14.7pp
30 to 34
2021 count
4,022
% of total
16.1%
Change from 2016
+16.1pp
4,022
16.1%
+16.1pp
35 to 39
2021 count
2,620
% of total
10.5%
Change from 2016
+7.2pp
2,620
10.5%
+7.2pp
40 to 44
2021 count
1,569
% of total
6.3%
Change from 2016
+1.3pp
1,569
6.3%
+1.3pp
45 to 49
2021 count
1,242
% of total
5.0%
Change from 2016
-9.9pp
1,242
5.0%
-9.9pp
50 to 54
2021 count
1,211
% of total
4.8%
Change from 2016
-6.2pp
1,211
4.8%
-6.2pp
55 to 59
2021 count
1,113
% of total
4.4%
Change from 2016
-1.7pp
1,113
4.4%
-1.7pp
60 to 64
2021 count
980
% of total
3.9%
Change from 2016
+1.7pp
980
3.9%
+1.7pp
65 to 69
2021 count
871
% of total
3.5%
Change from 2016
+3.5pp
871
3.5%
+3.5pp
70 to 74
2021 count
818
% of total
3.3%
Change from 2016
0.0pp
818
3.3%
0.0pp
75 to 79
2021 count
581
% of total
2.3%
Change from 2016
-1.0pp
581
2.3%
-1.0pp
80 to 84
2021 count
447
% of total
1.8%
Change from 2016
+0.1pp
447
1.8%
+0.1pp
85 and over
2021 count
359
% of total
1.4%
Change from 2016
-0.3pp
359
1.4%
-0.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+685
-1.6pp
5 to 9
+570
+0.6pp
10 to 14
+488
-3.5pp
15 to 19
+740
-3.1pp
20 to 24
+2,164
-2.9pp
25 to 29
+4,497
+14.7pp
30 to 34
+4,022
+16.1pp
35 to 39
+2,614
+7.2pp
40 to 44
+1,560
+1.3pp
45 to 49
+1,215
-9.9pp
50 to 54
+1,191
-6.2pp
55 to 59
+1,102
-1.7pp
60 to 64
+976
+1.7pp
65 to 69
+871
+3.5pp
70 to 74
+812
0.0pp
75 to 79
+575
-1.0pp
80 to 84
+444
+0.1pp
85 and over
+356
-0.3pp
Data table
Five year age groups for South Yarra (part). 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 | 693 | 2.8% | 3.8% | 8 | 4.4% | 4.2% | +685 | -1.6pp |
| 5 to 9 | 573 | 2.3% | 3.7% | 3 | 1.7% | 4.1% | +570 | +0.6pp |
| 10 to 14 | 498 | 2.0% | 4.0% | 10 | 5.5% | 4.1% | +488 | -3.5pp |
| 15 to 19 | 751 | 3.0% | 4.4% | 11 | 6.1% | 4.5% | +740 | -3.1pp |
| 20 to 24 | 2,185 | 8.7% | 7.8% | 21 | 11.6% | 9.2% | +2,164 | -2.9pp |
| 25 to 29 | 4,503 | 18.0% | 12.0% | 6 | 3.3% | 12.8% | +4,497 | +14.7pp |
| 30 to 34 | 4,022 | 16.1% | 10.7% | 0 | 0.0% | 10.9% | +4,022 | +16.1pp |
| 35 to 39 | 2,620 | 10.5% | 8.3% | 6 | 3.3% | 7.4% | +2,614 | +7.2pp |
| 40 to 44 | 1,569 | 6.3% | 6.1% | 9 | 5.0% | 6.2% | +1,560 | +1.3pp |
| 45 to 49 | 1,242 | 5.0% | 5.9% | 27 | 14.9% | 6.2% | +1,215 | -9.9pp |
| 50 to 54 | 1,211 | 4.8% | 6.2% | 20 | 11.0% | 5.5% | +1,191 | -6.2pp |
| 55 to 59 | 1,113 | 4.4% | 5.3% | 11 | 6.1% | 5.1% | +1,102 | -1.7pp |
| 60 to 64 | 980 | 3.9% | 4.9% | 4 | 2.2% | 4.6% | +976 | +1.7pp |
| 65 to 69 | 871 | 3.5% | 4.4% | 0 | 0.0% | 4.4% | +871 | +3.5pp |
| 70 to 74 | 818 | 3.3% | 4.2% | 6 | 3.3% | 3.4% | +812 | 0.0pp |
| 75 to 79 | 581 | 2.3% | 3.3% | 6 | 3.3% | 2.9% | +575 | -1.0pp |
| 80 to 84 | 447 | 1.8% | 2.5% | 3 | 1.7% | 2.1% | +444 | +0.1pp |
| 85 and over | 359 | 1.4% | 2.6% | 3 | 1.7% | 2.4% | +356 | -0.3pp |
| Total | 25,028 | 100.0% | 100.0% | 181 | 100.0% | 100.0% | +24,847 | 0.0pp |