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 Heidelberg, accounting for 9% (661 people). This share was higher than Banyule (C) (7%). Since 2016, the biggest change was in 35 to 39 year olds, which increased by 129 people and 0.5 percentage points.
Section overview
Age structure - Five year age groups
Heidelberg - Total persons (Usual residence)
This table summarises five year age groups for Heidelberg in 2021 for persons, with comparison against Banyule (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Heidelberg, with comparison markers for Banyule (C).
0 to 4
2021 count
413
% of total
5.6%
Change from 2016
-1.9pp
413
5.6%
-1.9pp
5 to 9
2021 count
445
% of total
6.0%
Change from 2016
-0.1pp
445
6.0%
-0.1pp
10 to 14
2021 count
381
% of total
5.2%
Change from 2016
+0.4pp
381
5.2%
+0.4pp
15 to 19
2021 count
309
% of total
4.2%
Change from 2016
-0.1pp
309
4.2%
-0.1pp
20 to 24
2021 count
368
% of total
5.0%
Change from 2016
-0.8pp
368
5.0%
-0.8pp
25 to 29
2021 count
578
% of total
7.9%
Change from 2016
-0.8pp
578
7.9%
-0.8pp
30 to 34
2021 count
661
% of total
9.0%
Change from 2016
0.0pp
661
9.0%
0.0pp
35 to 39
2021 count
646
% of total
8.8%
Change from 2016
+0.5pp
646
8.8%
+0.5pp
40 to 44
2021 count
569
% of total
7.7%
Change from 2016
+0.3pp
569
7.7%
+0.3pp
45 to 49
2021 count
488
% of total
6.6%
Change from 2016
+0.5pp
488
6.6%
+0.5pp
50 to 54
2021 count
408
% of total
5.5%
Change from 2016
-0.2pp
408
5.5%
-0.2pp
55 to 59
2021 count
380
% of total
5.2%
Change from 2016
-0.2pp
380
5.2%
-0.2pp
60 to 64
2021 count
391
% of total
5.3%
Change from 2016
+0.6pp
391
5.3%
+0.6pp
65 to 69
2021 count
322
% of total
4.4%
Change from 2016
+0.1pp
322
4.4%
+0.1pp
70 to 74
2021 count
285
% of total
3.9%
Change from 2016
-0.1pp
285
3.9%
-0.1pp
75 to 79
2021 count
269
% of total
3.7%
Change from 2016
+0.8pp
269
3.7%
+0.8pp
80 to 84
2021 count
212
% of total
2.9%
Change from 2016
+0.5pp
212
2.9%
+0.5pp
85 and over
2021 count
233
% of total
3.2%
Change from 2016
+0.7pp
233
3.2%
+0.7pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-54
-1.9pp
5 to 9
+67
-0.1pp
10 to 14
+80
+0.4pp
15 to 19
+43
-0.1pp
20 to 24
+9
-0.8pp
25 to 29
+39
-0.8pp
30 to 34
+99
0.0pp
35 to 39
+129
+0.5pp
40 to 44
+108
+0.3pp
45 to 49
+107
+0.5pp
50 to 54
+51
-0.2pp
55 to 59
+41
-0.2pp
60 to 64
+101
+0.6pp
65 to 69
+55
+0.1pp
70 to 74
+38
-0.1pp
75 to 79
+88
+0.8pp
80 to 84
+62
+0.5pp
85 and over
+77
+0.7pp
Data table
Five year age groups for Heidelberg. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Banyule (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Banyule (C)% | Count | % | Banyule (C)% | Count | pp | |
| 0 to 4 | 413 | 5.6% | 5.6% | 467 | 7.5% | 6.4% | -54 | -1.9pp |
| 5 to 9 | 445 | 6.0% | 6.2% | 378 | 6.1% | 6.2% | +67 | -0.1pp |
| 10 to 14 | 381 | 5.2% | 6.0% | 301 | 4.8% | 5.5% | +80 | +0.4pp |
| 15 to 19 | 309 | 4.2% | 5.4% | 266 | 4.3% | 5.6% | +43 | -0.1pp |
| 20 to 24 | 368 | 5.0% | 5.5% | 359 | 5.8% | 6.1% | +9 | -0.8pp |
| 25 to 29 | 578 | 7.9% | 5.9% | 539 | 8.7% | 6.5% | +39 | -0.8pp |
| 30 to 34 | 661 | 9.0% | 7.0% | 562 | 9.0% | 6.9% | +99 | 0.0pp |
| 35 to 39 | 646 | 8.8% | 7.3% | 517 | 8.3% | 7.1% | +129 | +0.5pp |
| 40 to 44 | 569 | 7.7% | 7.1% | 461 | 7.4% | 7.2% | +108 | +0.3pp |
| 45 to 49 | 488 | 6.6% | 6.9% | 381 | 6.1% | 6.9% | +107 | +0.5pp |
| 50 to 54 | 408 | 5.5% | 6.5% | 357 | 5.7% | 6.4% | +51 | -0.2pp |
| 55 to 59 | 380 | 5.2% | 5.9% | 339 | 5.4% | 6.3% | +41 | -0.2pp |
| 60 to 64 | 391 | 5.3% | 5.8% | 290 | 4.7% | 5.6% | +101 | +0.6pp |
| 65 to 69 | 322 | 4.4% | 5.2% | 267 | 4.3% | 5.4% | +55 | +0.1pp |
| 70 to 74 | 285 | 3.9% | 4.9% | 247 | 4.0% | 4.1% | +38 | -0.1pp |
| 75 to 79 | 269 | 3.7% | 3.6% | 181 | 2.9% | 3.0% | +88 | +0.8pp |
| 80 to 84 | 212 | 2.9% | 2.5% | 150 | 2.4% | 2.3% | +62 | +0.5pp |
| 85 and over | 233 | 3.2% | 2.7% | 156 | 2.5% | 2.7% | +77 | +0.7pp |
| Total | 7,360 | 100.0% | 100.0% | 6,225 | 100.0% | 100.0% | +1,135 | 0.0pp |