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, 35 to 39 year olds was the largest age group among residents in Unley, accounting for 7.6% (305 people). This share was higher than Unley (C) (6.4%). Since 2016, the biggest change was in 40 to 44 year olds, which decreased by 59 people and 1.5 percentage points.
Section overview
Age structure - Five year age groups
Unley - Total persons (Usual residence)
This table summarises five year age groups for Unley in 2021 for persons, with comparison against Unley (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Unley, with comparison markers for Unley (C).
0 to 4
2021 count
165
% of total
4.1%
Change from 2016
-1.2pp
165
4.1%
-1.2pp
5 to 9
2021 count
211
% of total
5.3%
Change from 2016
+0.3pp
211
5.3%
+0.3pp
10 to 14
2021 count
220
% of total
5.5%
Change from 2016
+0.6pp
220
5.5%
+0.6pp
15 to 19
2021 count
182
% of total
4.6%
Change from 2016
-1.2pp
182
4.6%
-1.2pp
20 to 24
2021 count
250
% of total
6.3%
Change from 2016
-1.0pp
250
6.3%
-1.0pp
25 to 29
2021 count
301
% of total
7.5%
Change from 2016
-0.7pp
301
7.5%
-0.7pp
30 to 34
2021 count
288
% of total
7.2%
Change from 2016
-0.7pp
288
7.2%
-0.7pp
35 to 39
2021 count
305
% of total
7.6%
Change from 2016
+1.2pp
305
7.6%
+1.2pp
40 to 44
2021 count
236
% of total
5.9%
Change from 2016
-1.5pp
236
5.9%
-1.5pp
45 to 49
2021 count
280
% of total
7.0%
Change from 2016
-0.3pp
280
7.0%
-0.3pp
50 to 54
2021 count
272
% of total
6.8%
Change from 2016
+0.1pp
272
6.8%
+0.1pp
55 to 59
2021 count
249
% of total
6.2%
Change from 2016
+0.6pp
249
6.2%
+0.6pp
60 to 64
2021 count
227
% of total
5.7%
Change from 2016
-0.5pp
227
5.7%
-0.5pp
65 to 69
2021 count
245
% of total
6.1%
Change from 2016
+0.6pp
245
6.1%
+0.6pp
70 to 74
2021 count
225
% of total
5.6%
Change from 2016
+1.2pp
225
5.6%
+1.2pp
75 to 79
2021 count
163
% of total
4.1%
Change from 2016
+0.8pp
163
4.1%
+0.8pp
80 to 84
2021 count
104
% of total
2.6%
Change from 2016
+0.8pp
104
2.6%
+0.8pp
85 and over
2021 count
74
% of total
1.9%
Change from 2016
+0.3pp
74
1.9%
+0.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-47
-1.2pp
5 to 9
+10
+0.3pp
10 to 14
+24
+0.6pp
15 to 19
-51
-1.2pp
20 to 24
-43
-1.0pp
25 to 29
-28
-0.7pp
30 to 34
-28
-0.7pp
35 to 39
+50
+1.2pp
40 to 44
-59
-1.5pp
45 to 49
-11
-0.3pp
50 to 54
+2
+0.1pp
55 to 59
+24
+0.6pp
60 to 64
-20
-0.5pp
65 to 69
+26
+0.6pp
70 to 74
+49
+1.2pp
75 to 79
+30
+0.8pp
80 to 84
+32
+0.8pp
85 and over
+10
+0.3pp
Data table
Five year age groups for Unley. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Unley (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Unley (C)% | Count | % | Unley (C)% | Count | pp | |
| 0 to 4 | 165 | 4.1% | 4.3% | 212 | 5.3% | 4.7% | -47 | -1.2pp |
| 5 to 9 | 211 | 5.3% | 5.3% | 201 | 5.0% | 5.7% | +10 | +0.3pp |
| 10 to 14 | 220 | 5.5% | 5.8% | 196 | 4.9% | 5.5% | +24 | +0.6pp |
| 15 to 19 | 182 | 4.6% | 5.4% | 233 | 5.8% | 5.8% | -51 | -1.2pp |
| 20 to 24 | 250 | 6.3% | 6.2% | 293 | 7.3% | 6.8% | -43 | -1.0pp |
| 25 to 29 | 301 | 7.5% | 6.3% | 329 | 8.2% | 7.0% | -28 | -0.7pp |
| 30 to 34 | 288 | 7.2% | 6.1% | 316 | 7.9% | 6.6% | -28 | -0.7pp |
| 35 to 39 | 305 | 7.6% | 6.4% | 255 | 6.4% | 6.4% | +50 | +1.2pp |
| 40 to 44 | 236 | 5.9% | 6.6% | 295 | 7.4% | 6.7% | -59 | -1.5pp |
| 45 to 49 | 280 | 7.0% | 6.6% | 291 | 7.3% | 6.7% | -11 | -0.3pp |
| 50 to 54 | 272 | 6.8% | 6.6% | 270 | 6.7% | 6.4% | +2 | +0.1pp |
| 55 to 59 | 249 | 6.2% | 6.0% | 225 | 5.6% | 6.3% | +24 | +0.6pp |
| 60 to 64 | 227 | 5.7% | 6.1% | 247 | 6.2% | 6.3% | -20 | -0.5pp |
| 65 to 69 | 245 | 6.1% | 5.8% | 219 | 5.5% | 5.6% | +26 | +0.6pp |
| 70 to 74 | 225 | 5.6% | 5.5% | 176 | 4.4% | 3.9% | +49 | +1.2pp |
| 75 to 79 | 163 | 4.1% | 3.8% | 133 | 3.3% | 3.0% | +30 | +0.8pp |
| 80 to 84 | 104 | 2.6% | 2.9% | 72 | 1.8% | 2.3% | +32 | +0.8pp |
| 85 and over | 74 | 1.9% | 4.1% | 64 | 1.6% | 4.3% | +10 | +0.3pp |
| Total | 3,997 | 100.0% | 100.0% | 4,006 | 100.0% | 100.0% | -9 | 0.0pp |