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, 45 to 49 year olds was the largest age group among residents in Glenalta, accounting for 7.9% (161 people). This share was higher than Mitcham (C) (7.1%). Since 2016, the biggest change was in 60 to 64 year olds, which decreased by 39 people and 2.2 percentage points.
Section overview
Age structure - Five year age groups
Glenalta - Total persons (Usual residence)
This table summarises five year age groups for Glenalta 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 Glenalta, with comparison markers for Mitcham (C).
0 to 4
2021 count
127
% of total
6.2%
Change from 2016
+0.4pp
127
6.2%
+0.4pp
5 to 9
2021 count
144
% of total
7.1%
Change from 2016
-0.7pp
144
7.1%
-0.7pp
10 to 14
2021 count
148
% of total
7.3%
Change from 2016
+1.5pp
148
7.3%
+1.5pp
15 to 19
2021 count
127
% of total
6.2%
Change from 2016
+0.4pp
127
6.2%
+0.4pp
20 to 24
2021 count
89
% of total
4.4%
Change from 2016
-0.1pp
89
4.4%
-0.1pp
25 to 29
2021 count
77
% of total
3.8%
Change from 2016
+0.5pp
77
3.8%
+0.5pp
30 to 34
2021 count
105
% of total
5.1%
Change from 2016
+0.1pp
105
5.1%
+0.1pp
35 to 39
2021 count
135
% of total
6.6%
Change from 2016
+0.2pp
135
6.6%
+0.2pp
40 to 44
2021 count
143
% of total
7.0%
Change from 2016
-0.8pp
143
7.0%
-0.8pp
45 to 49
2021 count
161
% of total
7.9%
Change from 2016
+1.3pp
161
7.9%
+1.3pp
50 to 54
2021 count
140
% of total
6.9%
Change from 2016
+0.6pp
140
6.9%
+0.6pp
55 to 59
2021 count
108
% of total
5.3%
Change from 2016
-0.5pp
108
5.3%
-0.5pp
60 to 64
2021 count
86
% of total
4.2%
Change from 2016
-2.2pp
86
4.2%
-2.2pp
65 to 69
2021 count
109
% of total
5.3%
Change from 2016
-0.7pp
109
5.3%
-0.7pp
70 to 74
2021 count
99
% of total
4.9%
Change from 2016
-2.0pp
99
4.9%
-2.0pp
75 to 79
2021 count
119
% of total
5.8%
Change from 2016
-0.3pp
119
5.8%
-0.3pp
80 to 84
2021 count
82
% of total
4.0%
Change from 2016
+1.3pp
82
4.0%
+1.3pp
85 and over
2021 count
45
% of total
2.2%
Change from 2016
+0.8pp
45
2.2%
+0.8pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+14
+0.4pp
5 to 9
-8
-0.7pp
10 to 14
+34
+1.5pp
15 to 19
+13
+0.4pp
20 to 24
+1
-0.1pp
25 to 29
+12
+0.5pp
30 to 34
+8
+0.1pp
35 to 39
+10
+0.2pp
40 to 44
-10
-0.8pp
45 to 49
+31
+1.3pp
50 to 54
+17
+0.6pp
55 to 59
-6
-0.5pp
60 to 64
-39
-2.2pp
65 to 69
-9
-0.7pp
70 to 74
-37
-2.0pp
75 to 79
0
-0.3pp
80 to 84
+30
+1.3pp
85 and over
+17
+0.8pp
Data table
Five year age groups for Glenalta. 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 | 127 | 6.2% | 4.9% | 113 | 5.8% | 5.3% | +14 | +0.4pp |
| 5 to 9 | 144 | 7.1% | 6.0% | 152 | 7.8% | 6.2% | -8 | -0.7pp |
| 10 to 14 | 148 | 7.3% | 6.4% | 114 | 5.8% | 6.1% | +34 | +1.5pp |
| 15 to 19 | 127 | 6.2% | 6.4% | 114 | 5.8% | 6.6% | +13 | +0.4pp |
| 20 to 24 | 89 | 4.4% | 6.0% | 88 | 4.5% | 6.4% | +1 | -0.1pp |
| 25 to 29 | 77 | 3.8% | 5.1% | 65 | 3.3% | 5.1% | +12 | +0.5pp |
| 30 to 34 | 105 | 5.1% | 5.4% | 97 | 5.0% | 5.6% | +8 | +0.1pp |
| 35 to 39 | 135 | 6.6% | 6.2% | 125 | 6.4% | 6.0% | +10 | +0.2pp |
| 40 to 44 | 143 | 7.0% | 6.6% | 153 | 7.8% | 6.9% | -10 | -0.8pp |
| 45 to 49 | 161 | 7.9% | 7.1% | 130 | 6.6% | 7.1% | +31 | +1.3pp |
| 50 to 54 | 140 | 6.9% | 6.7% | 123 | 6.3% | 6.7% | +17 | +0.6pp |
| 55 to 59 | 108 | 5.3% | 6.2% | 114 | 5.8% | 6.7% | -6 | -0.5pp |
| 60 to 64 | 86 | 4.2% | 6.1% | 125 | 6.4% | 5.8% | -39 | -2.2pp |
| 65 to 69 | 109 | 5.3% | 5.4% | 118 | 6.0% | 5.7% | -9 | -0.7pp |
| 70 to 74 | 99 | 4.9% | 5.4% | 136 | 6.9% | 4.6% | -37 | -2.0pp |
| 75 to 79 | 119 | 5.8% | 4.1% | 119 | 6.1% | 3.4% | 0 | -0.3pp |
| 80 to 84 | 82 | 4.0% | 2.8% | 52 | 2.7% | 2.5% | +30 | +1.3pp |
| 85 and over | 45 | 2.2% | 3.3% | 28 | 1.4% | 3.4% | +17 | +0.8pp |
| Total | 2,039 | 100.0% | 100.0% | 1,959 | 100.0% | 100.0% | +80 | 0.0pp |