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, 60 to 64 year olds was the largest age group among residents in St Helena, accounting for 8.1% (235 people). This share was higher than Banyule (C) (5.8%). Since 2016, the biggest change was in 65 to 69 year olds, which increased by 79 people and 2.8 percentage points.
Section overview
Age structure - Five year age groups
St Helena - Total persons (Usual residence)
This table summarises five year age groups for St Helena 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 St Helena, with comparison markers for Banyule (C).
0 to 4
2021 count
122
% of total
4.2%
Change from 2016
-1.3pp
122
4.2%
-1.3pp
5 to 9
2021 count
197
% of total
6.8%
Change from 2016
+0.8pp
197
6.8%
+0.8pp
10 to 14
2021 count
188
% of total
6.5%
Change from 2016
+1.5pp
188
6.5%
+1.5pp
15 to 19
2021 count
161
% of total
5.6%
Change from 2016
-1.6pp
161
5.6%
-1.6pp
20 to 24
2021 count
165
% of total
5.7%
Change from 2016
-1.9pp
165
5.7%
-1.9pp
25 to 29
2021 count
113
% of total
3.9%
Change from 2016
-1.5pp
113
3.9%
-1.5pp
30 to 34
2021 count
108
% of total
3.7%
Change from 2016
-0.8pp
108
3.7%
-0.8pp
35 to 39
2021 count
156
% of total
5.4%
Change from 2016
0.0pp
156
5.4%
0.0pp
40 to 44
2021 count
204
% of total
7.1%
Change from 2016
+1.6pp
204
7.1%
+1.6pp
45 to 49
2021 count
160
% of total
5.5%
Change from 2016
-1.3pp
160
5.5%
-1.3pp
50 to 54
2021 count
197
% of total
6.8%
Change from 2016
-1.5pp
197
6.8%
-1.5pp
55 to 59
2021 count
225
% of total
7.8%
Change from 2016
-0.9pp
225
7.8%
-0.9pp
60 to 64
2021 count
235
% of total
8.1%
Change from 2016
+0.2pp
235
8.1%
+0.2pp
65 to 69
2021 count
214
% of total
7.4%
Change from 2016
+2.8pp
214
7.4%
+2.8pp
70 to 74
2021 count
151
% of total
5.2%
Change from 2016
+2.2pp
151
5.2%
+2.2pp
75 to 79
2021 count
119
% of total
4.1%
Change from 2016
+1.9pp
119
4.1%
+1.9pp
80 to 84
2021 count
83
% of total
2.9%
Change from 2016
+0.7pp
83
2.9%
+0.7pp
85 and over
2021 count
112
% of total
3.9%
Change from 2016
0.0pp
112
3.9%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-39
-1.3pp
5 to 9
+22
+0.8pp
10 to 14
+42
+1.5pp
15 to 19
-50
-1.6pp
20 to 24
-58
-1.9pp
25 to 29
-46
-1.5pp
30 to 34
-23
-0.8pp
35 to 39
-1
0.0pp
40 to 44
+44
+1.6pp
45 to 49
-38
-1.3pp
50 to 54
-45
-1.5pp
55 to 59
-28
-0.9pp
60 to 64
+4
+0.2pp
65 to 69
+79
+2.8pp
70 to 74
+62
+2.2pp
75 to 79
+55
+1.9pp
80 to 84
+20
+0.7pp
85 and over
-3
0.0pp
Data table
Five year age groups for St Helena. 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 | 122 | 4.2% | 5.6% | 161 | 5.5% | 6.4% | -39 | -1.3pp |
| 5 to 9 | 197 | 6.8% | 6.2% | 175 | 6.0% | 6.2% | +22 | +0.8pp |
| 10 to 14 | 188 | 6.5% | 6.0% | 146 | 5.0% | 5.5% | +42 | +1.5pp |
| 15 to 19 | 161 | 5.6% | 5.4% | 211 | 7.2% | 5.6% | -50 | -1.6pp |
| 20 to 24 | 165 | 5.7% | 5.5% | 223 | 7.6% | 6.1% | -58 | -1.9pp |
| 25 to 29 | 113 | 3.9% | 5.9% | 159 | 5.4% | 6.5% | -46 | -1.5pp |
| 30 to 34 | 108 | 3.7% | 7.0% | 131 | 4.5% | 6.9% | -23 | -0.8pp |
| 35 to 39 | 156 | 5.4% | 7.3% | 157 | 5.4% | 7.1% | -1 | 0.0pp |
| 40 to 44 | 204 | 7.1% | 7.1% | 160 | 5.5% | 7.2% | +44 | +1.6pp |
| 45 to 49 | 160 | 5.5% | 6.9% | 198 | 6.8% | 6.9% | -38 | -1.3pp |
| 50 to 54 | 197 | 6.8% | 6.5% | 242 | 8.3% | 6.4% | -45 | -1.5pp |
| 55 to 59 | 225 | 7.8% | 5.9% | 253 | 8.7% | 6.3% | -28 | -0.9pp |
| 60 to 64 | 235 | 8.1% | 5.8% | 231 | 7.9% | 5.6% | +4 | +0.2pp |
| 65 to 69 | 214 | 7.4% | 5.2% | 135 | 4.6% | 5.4% | +79 | +2.8pp |
| 70 to 74 | 151 | 5.2% | 4.9% | 89 | 3.0% | 4.1% | +62 | +2.2pp |
| 75 to 79 | 119 | 4.1% | 3.6% | 64 | 2.2% | 3.0% | +55 | +1.9pp |
| 80 to 84 | 83 | 2.9% | 2.5% | 63 | 2.2% | 2.3% | +20 | +0.7pp |
| 85 and over | 112 | 3.9% | 2.7% | 115 | 3.9% | 2.7% | -3 | 0.0pp |
| Total | 2,890 | 100.0% | 100.0% | 2,923 | 100.0% | 100.0% | -33 | 0.0pp |