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 Millswood, accounting for 7.9% (172 people). This share was higher than Unley (C) (6.6%). Since 2016, the biggest change was in 10 to 14 year olds, which increased by 133 people and 4.4 percentage points.
Section overview
Age structure - Five year age groups
Millswood - Total persons (Usual residence)
This table summarises five year age groups for Millswood 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 Millswood, with comparison markers for Unley (C).
0 to 4
2021 count
78
% of total
3.6%
Change from 2016
-0.9pp
78
3.6%
-0.9pp
5 to 9
2021 count
127
% of total
5.8%
Change from 2016
-1.7pp
127
5.8%
-1.7pp
10 to 14
2021 count
170
% of total
7.8%
Change from 2016
+4.4pp
170
7.8%
+4.4pp
15 to 19
2021 count
149
% of total
6.9%
Change from 2016
+1.8pp
149
6.9%
+1.8pp
20 to 24
2021 count
145
% of total
6.7%
Change from 2016
+3.9pp
145
6.7%
+3.9pp
25 to 29
2021 count
92
% of total
4.2%
Change from 2016
+1.0pp
92
4.2%
+1.0pp
30 to 34
2021 count
69
% of total
3.2%
Change from 2016
-2.4pp
69
3.2%
-2.4pp
35 to 39
2021 count
99
% of total
4.6%
Change from 2016
+0.3pp
99
4.6%
+0.3pp
40 to 44
2021 count
132
% of total
6.1%
Change from 2016
+1.2pp
132
6.1%
+1.2pp
45 to 49
2021 count
146
% of total
6.7%
Change from 2016
+2.3pp
146
6.7%
+2.3pp
50 to 54
2021 count
172
% of total
7.9%
Change from 2016
+0.8pp
172
7.9%
+0.8pp
55 to 59
2021 count
142
% of total
6.5%
Change from 2016
-1.9pp
142
6.5%
-1.9pp
60 to 64
2021 count
165
% of total
7.6%
Change from 2016
-1.4pp
165
7.6%
-1.4pp
65 to 69
2021 count
142
% of total
6.5%
Change from 2016
-3.2pp
142
6.5%
-3.2pp
70 to 74
2021 count
123
% of total
5.7%
Change from 2016
-0.4pp
123
5.7%
-0.4pp
75 to 79
2021 count
110
% of total
5.1%
Change from 2016
0.0pp
110
5.1%
0.0pp
80 to 84
2021 count
61
% of total
2.8%
Change from 2016
-1.6pp
61
2.8%
-1.6pp
85 and over
2021 count
37
% of total
1.7%
Change from 2016
-4.6pp
37
1.7%
-4.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+28
-0.9pp
5 to 9
+45
-1.7pp
10 to 14
+133
+4.4pp
15 to 19
+93
+1.8pp
20 to 24
+114
+3.9pp
25 to 29
+57
+1.0pp
30 to 34
+8
-2.4pp
35 to 39
+52
+0.3pp
40 to 44
+78
+1.2pp
45 to 49
+98
+2.3pp
50 to 54
+94
+0.8pp
55 to 59
+50
-1.9pp
60 to 64
+66
-1.4pp
65 to 69
+35
-3.2pp
70 to 74
+56
-0.4pp
75 to 79
+54
0.0pp
80 to 84
+13
-1.6pp
85 and over
-32
-4.6pp
Data table
Five year age groups for Millswood. 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 | 78 | 3.6% | 4.3% | 50 | 4.5% | 4.7% | +28 | -0.9pp |
| 5 to 9 | 127 | 5.8% | 5.3% | 82 | 7.5% | 5.7% | +45 | -1.7pp |
| 10 to 14 | 170 | 7.8% | 5.8% | 37 | 3.4% | 5.5% | +133 | +4.4pp |
| 15 to 19 | 149 | 6.9% | 5.4% | 56 | 5.1% | 5.8% | +93 | +1.8pp |
| 20 to 24 | 145 | 6.7% | 6.2% | 31 | 2.8% | 6.8% | +114 | +3.9pp |
| 25 to 29 | 92 | 4.2% | 6.3% | 35 | 3.2% | 7.0% | +57 | +1.0pp |
| 30 to 34 | 69 | 3.2% | 6.1% | 61 | 5.6% | 6.6% | +8 | -2.4pp |
| 35 to 39 | 99 | 4.6% | 6.4% | 47 | 4.3% | 6.4% | +52 | +0.3pp |
| 40 to 44 | 132 | 6.1% | 6.6% | 54 | 4.9% | 6.7% | +78 | +1.2pp |
| 45 to 49 | 146 | 6.7% | 6.6% | 48 | 4.4% | 6.7% | +98 | +2.3pp |
| 50 to 54 | 172 | 7.9% | 6.6% | 78 | 7.1% | 6.4% | +94 | +0.8pp |
| 55 to 59 | 142 | 6.5% | 6.0% | 92 | 8.4% | 6.3% | +50 | -1.9pp |
| 60 to 64 | 165 | 7.6% | 6.1% | 99 | 9.0% | 6.3% | +66 | -1.4pp |
| 65 to 69 | 142 | 6.5% | 5.8% | 107 | 9.7% | 5.6% | +35 | -3.2pp |
| 70 to 74 | 123 | 5.7% | 5.5% | 67 | 6.1% | 3.9% | +56 | -0.4pp |
| 75 to 79 | 110 | 5.1% | 3.8% | 56 | 5.1% | 3.0% | +54 | 0.0pp |
| 80 to 84 | 61 | 2.8% | 2.9% | 48 | 4.4% | 2.3% | +13 | -1.6pp |
| 85 and over | 37 | 1.7% | 4.1% | 69 | 6.3% | 4.3% | -32 | -4.6pp |
| Total | 2,173 | 100.0% | 100.0% | 1,099 | 100.0% | 100.0% | +1,074 | 0.0pp |