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 Prahran, accounting for 15.7% (1,913 people). This share was higher than Stonnington (C) (12%). Since 2016, the biggest change was in 25 to 29 year olds, which decreased by 422 people and 2.3 percentage points.
Section overview
Age structure - Five year age groups
Prahran - Total persons (Usual residence)
This table summarises five year age groups for Prahran 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 Prahran, with comparison markers for Stonnington (C).
0 to 4
2021 count
499
% of total
4.1%
Change from 2016
+0.2pp
499
4.1%
+0.2pp
5 to 9
2021 count
303
% of total
2.5%
Change from 2016
0.0pp
303
2.5%
0.0pp
10 to 14
2021 count
269
% of total
2.2%
Change from 2016
+0.1pp
269
2.2%
+0.1pp
15 to 19
2021 count
284
% of total
2.3%
Change from 2016
-0.5pp
284
2.3%
-0.5pp
20 to 24
2021 count
960
% of total
7.9%
Change from 2016
-1.3pp
960
7.9%
-1.3pp
25 to 29
2021 count
1,913
% of total
15.7%
Change from 2016
-2.3pp
1,913
15.7%
-2.3pp
30 to 34
2021 count
1,889
% of total
15.5%
Change from 2016
-0.6pp
1,889
15.5%
-0.6pp
35 to 39
2021 count
1,373
% of total
11.3%
Change from 2016
+2.0pp
1,373
11.3%
+2.0pp
40 to 44
2021 count
840
% of total
6.9%
Change from 2016
+0.2pp
840
6.9%
+0.2pp
45 to 49
2021 count
671
% of total
5.5%
Change from 2016
0.0pp
671
5.5%
0.0pp
50 to 54
2021 count
657
% of total
5.4%
Change from 2016
+0.9pp
657
5.4%
+0.9pp
55 to 59
2021 count
534
% of total
4.4%
Change from 2016
+0.1pp
534
4.4%
+0.1pp
60 to 64
2021 count
503
% of total
4.1%
Change from 2016
+0.6pp
503
4.1%
+0.6pp
65 to 69
2021 count
397
% of total
3.3%
Change from 2016
0.0pp
397
3.3%
0.0pp
70 to 74
2021 count
358
% of total
2.9%
Change from 2016
+0.6pp
358
2.9%
+0.6pp
75 to 79
2021 count
260
% of total
2.1%
Change from 2016
-0.3pp
260
2.1%
-0.3pp
80 to 84
2021 count
259
% of total
2.1%
Change from 2016
+0.4pp
259
2.1%
+0.4pp
85 and over
2021 count
252
% of total
2.1%
Change from 2016
+0.3pp
252
2.1%
+0.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-6
+0.2pp
5 to 9
-26
0.0pp
10 to 14
-7
+0.1pp
15 to 19
-78
-0.5pp
20 to 24
-230
-1.3pp
25 to 29
-422
-2.3pp
30 to 34
-207
-0.6pp
35 to 39
+167
+2.0pp
40 to 44
-34
+0.2pp
45 to 49
-49
0.0pp
50 to 54
+77
+0.9pp
55 to 59
-28
+0.1pp
60 to 64
+50
+0.6pp
65 to 69
-28
0.0pp
70 to 74
+64
+0.6pp
75 to 79
-57
-0.3pp
80 to 84
+37
+0.4pp
85 and over
+19
+0.3pp
Data table
Five year age groups for Prahran. 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 | 499 | 4.1% | 3.8% | 505 | 3.9% | 4.2% | -6 | +0.2pp |
| 5 to 9 | 303 | 2.5% | 3.7% | 329 | 2.5% | 4.1% | -26 | 0.0pp |
| 10 to 14 | 269 | 2.2% | 4.0% | 276 | 2.1% | 4.1% | -7 | +0.1pp |
| 15 to 19 | 284 | 2.3% | 4.4% | 362 | 2.8% | 4.5% | -78 | -0.5pp |
| 20 to 24 | 960 | 7.9% | 7.8% | 1,190 | 9.2% | 9.2% | -230 | -1.3pp |
| 25 to 29 | 1,913 | 15.7% | 12.0% | 2,335 | 18.0% | 12.8% | -422 | -2.3pp |
| 30 to 34 | 1,889 | 15.5% | 10.7% | 2,096 | 16.1% | 10.9% | -207 | -0.6pp |
| 35 to 39 | 1,373 | 11.3% | 8.3% | 1,206 | 9.3% | 7.4% | +167 | +2.0pp |
| 40 to 44 | 840 | 6.9% | 6.1% | 874 | 6.7% | 6.2% | -34 | +0.2pp |
| 45 to 49 | 671 | 5.5% | 5.9% | 720 | 5.5% | 6.2% | -49 | 0.0pp |
| 50 to 54 | 657 | 5.4% | 6.2% | 580 | 4.5% | 5.5% | +77 | +0.9pp |
| 55 to 59 | 534 | 4.4% | 5.3% | 562 | 4.3% | 5.1% | -28 | +0.1pp |
| 60 to 64 | 503 | 4.1% | 4.9% | 453 | 3.5% | 4.6% | +50 | +0.6pp |
| 65 to 69 | 397 | 3.3% | 4.4% | 425 | 3.3% | 4.4% | -28 | 0.0pp |
| 70 to 74 | 358 | 2.9% | 4.2% | 294 | 2.3% | 3.4% | +64 | +0.6pp |
| 75 to 79 | 260 | 2.1% | 3.3% | 317 | 2.4% | 2.9% | -57 | -0.3pp |
| 80 to 84 | 259 | 2.1% | 2.5% | 222 | 1.7% | 2.1% | +37 | +0.4pp |
| 85 and over | 252 | 2.1% | 2.6% | 233 | 1.8% | 2.4% | +19 | +0.3pp |
| Total | 12,203 | 100.0% | 100.0% | 12,982 | 100.0% | 100.0% | -779 | 0.0pp |