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, 50 to 54 year olds was the largest age group among residents in Belair (part), accounting for 7.5% (354 people). This share was higher than Mitcham (C) (6.7%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 90 people and 1.5 percentage points.
Section overview
Age structure - Five year age groups
Belair (part) - Total persons (Usual residence)
This table summarises five year age groups for Belair (part) in 2021 for persons, with comparison against Mitcham (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Belair (part), with comparison markers for Mitcham (C).
0 to 4
2021 count
218
% of total
4.6%
Change from 2016
+0.2pp
218
4.6%
+0.2pp
5 to 9
2021 count
262
% of total
5.6%
Change from 2016
+1.0pp
262
5.6%
+1.0pp
10 to 14
2021 count
298
% of total
6.3%
Change from 2016
-0.3pp
298
6.3%
-0.3pp
15 to 19
2021 count
314
% of total
6.7%
Change from 2016
-0.3pp
314
6.7%
-0.3pp
20 to 24
2021 count
260
% of total
5.5%
Change from 2016
-0.1pp
260
5.5%
-0.1pp
25 to 29
2021 count
139
% of total
2.9%
Change from 2016
-0.4pp
139
2.9%
-0.4pp
30 to 34
2021 count
169
% of total
3.6%
Change from 2016
-0.3pp
169
3.6%
-0.3pp
35 to 39
2021 count
256
% of total
5.4%
Change from 2016
+0.3pp
256
5.4%
+0.3pp
40 to 44
2021 count
308
% of total
6.5%
Change from 2016
+0.1pp
308
6.5%
+0.1pp
45 to 49
2021 count
328
% of total
7.0%
Change from 2016
-1.1pp
328
7.0%
-1.1pp
50 to 54
2021 count
354
% of total
7.5%
Change from 2016
-0.4pp
354
7.5%
-0.4pp
55 to 59
2021 count
322
% of total
6.8%
Change from 2016
+0.4pp
322
6.8%
+0.4pp
60 to 64
2021 count
283
% of total
6.0%
Change from 2016
-0.8pp
283
6.0%
-0.8pp
65 to 69
2021 count
275
% of total
5.8%
Change from 2016
-1.2pp
275
5.8%
-1.2pp
70 to 74
2021 count
323
% of total
6.8%
Change from 2016
+1.5pp
323
6.8%
+1.5pp
75 to 79
2021 count
253
% of total
5.4%
Change from 2016
+1.6pp
253
5.4%
+1.6pp
80 to 84
2021 count
160
% of total
3.4%
Change from 2016
+0.7pp
160
3.4%
+0.7pp
85 and over
2021 count
196
% of total
4.2%
Change from 2016
-0.3pp
196
4.2%
-0.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+22
+0.2pp
5 to 9
+57
+1.0pp
10 to 14
+9
-0.3pp
15 to 19
+6
-0.3pp
20 to 24
+12
-0.1pp
25 to 29
-5
-0.4pp
30 to 34
-2
-0.3pp
35 to 39
+30
+0.3pp
40 to 44
+24
+0.1pp
45 to 49
-28
-1.1pp
50 to 54
+5
-0.4pp
55 to 59
+40
+0.4pp
60 to 64
-17
-0.8pp
65 to 69
-32
-1.2pp
70 to 74
+90
+1.5pp
75 to 79
+87
+1.6pp
80 to 84
+43
+0.7pp
85 and over
-1
-0.3pp
Data table
Five year age groups for Belair (part). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Mitcham (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Mitcham (C)% | Count | % | Mitcham (C)% | Count | pp | |
| 0 to 4 | 218 | 4.6% | 4.9% | 196 | 4.4% | 5.3% | +22 | +0.2pp |
| 5 to 9 | 262 | 5.6% | 6.0% | 205 | 4.6% | 6.2% | +57 | +1.0pp |
| 10 to 14 | 298 | 6.3% | 6.4% | 289 | 6.6% | 6.1% | +9 | -0.3pp |
| 15 to 19 | 314 | 6.7% | 6.4% | 308 | 7.0% | 6.6% | +6 | -0.3pp |
| 20 to 24 | 260 | 5.5% | 6.0% | 248 | 5.6% | 6.4% | +12 | -0.1pp |
| 25 to 29 | 139 | 2.9% | 5.1% | 144 | 3.3% | 5.1% | -5 | -0.4pp |
| 30 to 34 | 169 | 3.6% | 5.4% | 171 | 3.9% | 5.6% | -2 | -0.3pp |
| 35 to 39 | 256 | 5.4% | 6.2% | 226 | 5.1% | 6.0% | +30 | +0.3pp |
| 40 to 44 | 308 | 6.5% | 6.6% | 284 | 6.4% | 6.9% | +24 | +0.1pp |
| 45 to 49 | 328 | 7.0% | 7.1% | 356 | 8.1% | 7.1% | -28 | -1.1pp |
| 50 to 54 | 354 | 7.5% | 6.7% | 349 | 7.9% | 6.7% | +5 | -0.4pp |
| 55 to 59 | 322 | 6.8% | 6.2% | 282 | 6.4% | 6.7% | +40 | +0.4pp |
| 60 to 64 | 283 | 6.0% | 6.1% | 300 | 6.8% | 5.8% | -17 | -0.8pp |
| 65 to 69 | 275 | 5.8% | 5.4% | 307 | 7.0% | 5.7% | -32 | -1.2pp |
| 70 to 74 | 323 | 6.8% | 5.4% | 233 | 5.3% | 4.6% | +90 | +1.5pp |
| 75 to 79 | 253 | 5.4% | 4.1% | 166 | 3.8% | 3.4% | +87 | +1.6pp |
| 80 to 84 | 160 | 3.4% | 2.8% | 117 | 2.7% | 2.5% | +43 | +0.7pp |
| 85 and over | 196 | 4.2% | 3.3% | 197 | 4.5% | 3.4% | -1 | -0.3pp |
| Total | 4,718 | 100.0% | 100.0% | 4,411 | 100.0% | 100.0% | +307 | 0.0pp |