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, 55 to 59 year olds was the largest age group among residents in Sellicks Beach, accounting for 7.8% (212 people). This share was higher than Onkaparinga (C) (6.5%). Since 2016, the biggest change was in 55 to 59 year olds, which increased by 209 people and 3.6 percentage points.
Section overview
Age structure - Five year age groups
Sellicks Beach - Total persons (Usual residence)
This table summarises five year age groups for Sellicks Beach in 2021 for persons, with comparison against Onkaparinga (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Sellicks Beach, with comparison markers for Onkaparinga (C).
0 to 4
2021 count
142
% of total
5.2%
Change from 2016
-3.1pp
142
5.2%
-3.1pp
5 to 9
2021 count
187
% of total
6.9%
Change from 2016
-1.4pp
187
6.9%
-1.4pp
10 to 14
2021 count
166
% of total
6.1%
Change from 2016
+6.1pp
166
6.1%
+6.1pp
15 to 19
2021 count
140
% of total
5.2%
Change from 2016
+5.2pp
140
5.2%
+5.2pp
20 to 24
2021 count
141
% of total
5.2%
Change from 2016
+5.2pp
141
5.2%
+5.2pp
25 to 29
2021 count
156
% of total
5.8%
Change from 2016
+5.8pp
156
5.8%
+5.8pp
30 to 34
2021 count
182
% of total
6.7%
Change from 2016
+1.1pp
182
6.7%
+1.1pp
35 to 39
2021 count
189
% of total
7.0%
Change from 2016
+2.8pp
189
7.0%
+2.8pp
40 to 44
2021 count
150
% of total
5.5%
Change from 2016
+1.3pp
150
5.5%
+1.3pp
45 to 49
2021 count
173
% of total
6.4%
Change from 2016
+6.4pp
173
6.4%
+6.4pp
50 to 54
2021 count
207
% of total
7.7%
Change from 2016
+3.5pp
207
7.7%
+3.5pp
55 to 59
2021 count
212
% of total
7.8%
Change from 2016
+3.6pp
212
7.8%
+3.6pp
60 to 64
2021 count
184
% of total
6.8%
Change from 2016
-1.5pp
184
6.8%
-1.5pp
65 to 69
2021 count
178
% of total
6.6%
Change from 2016
+6.6pp
178
6.6%
+6.6pp
70 to 74
2021 count
137
% of total
5.1%
Change from 2016
-0.5pp
137
5.1%
-0.5pp
75 to 79
2021 count
83
% of total
3.1%
Change from 2016
-5.2pp
83
3.1%
-5.2pp
80 to 84
2021 count
38
% of total
1.4%
Change from 2016
+1.4pp
38
1.4%
+1.4pp
85 and over
2021 count
12
% of total
0.4%
Change from 2016
+0.4pp
12
0.4%
+0.4pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+136
-3.1pp
5 to 9
+181
-1.4pp
10 to 14
+166
+6.1pp
15 to 19
+140
+5.2pp
20 to 24
+141
+5.2pp
25 to 29
+156
+5.8pp
30 to 34
+178
+1.1pp
35 to 39
+186
+2.8pp
40 to 44
+147
+1.3pp
45 to 49
+173
+6.4pp
50 to 54
+204
+3.5pp
55 to 59
+209
+3.6pp
60 to 64
+178
-1.5pp
65 to 69
+178
+6.6pp
70 to 74
+133
-0.5pp
75 to 79
+77
-5.2pp
80 to 84
+38
+1.4pp
85 and over
+12
+0.4pp
Data table
Five year age groups for Sellicks Beach. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Onkaparinga (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Onkaparinga (C)% | Count | % | Onkaparinga (C)% | Count | pp | |
| 0 to 4 | 142 | 5.2% | 5.4% | 6 | 8.3% | 6.2% | +136 | -3.1pp |
| 5 to 9 | 187 | 6.9% | 6.2% | 6 | 8.3% | 6.4% | +181 | -1.4pp |
| 10 to 14 | 166 | 6.1% | 6.2% | 0 | 0.0% | 6.1% | +166 | +6.1pp |
| 15 to 19 | 140 | 5.2% | 5.8% | 0 | 0.0% | 6.2% | +140 | +5.2pp |
| 20 to 24 | 141 | 5.2% | 5.6% | 0 | 0.0% | 6.0% | +141 | +5.2pp |
| 25 to 29 | 156 | 5.8% | 6.0% | 0 | 0.0% | 5.9% | +156 | +5.8pp |
| 30 to 34 | 182 | 6.7% | 6.3% | 4 | 5.6% | 6.5% | +178 | +1.1pp |
| 35 to 39 | 189 | 7.0% | 6.7% | 3 | 4.2% | 6.3% | +186 | +2.8pp |
| 40 to 44 | 150 | 5.5% | 6.1% | 3 | 4.2% | 6.6% | +147 | +1.3pp |
| 45 to 49 | 173 | 6.4% | 6.4% | 0 | 0.0% | 6.9% | +173 | +6.4pp |
| 50 to 54 | 207 | 7.7% | 6.6% | 3 | 4.2% | 6.7% | +204 | +3.5pp |
| 55 to 59 | 212 | 7.8% | 6.5% | 3 | 4.2% | 6.6% | +209 | +3.6pp |
| 60 to 64 | 184 | 6.8% | 6.3% | 6 | 8.3% | 6.3% | +178 | -1.5pp |
| 65 to 69 | 178 | 6.6% | 5.9% | 0 | 0.0% | 6.1% | +178 | +6.6pp |
| 70 to 74 | 137 | 5.1% | 5.7% | 4 | 5.6% | 4.3% | +133 | -0.5pp |
| 75 to 79 | 83 | 3.1% | 3.8% | 6 | 8.3% | 2.8% | +77 | -5.2pp |
| 80 to 84 | 38 | 1.4% | 2.3% | 0 | 0.0% | 2.0% | +38 | +1.4pp |
| 85 and over | 12 | 0.4% | 2.2% | 0 | 0.0% | 2.1% | +12 | +0.4pp |
| Total | 2,705 | 100.0% | 100.0% | 72 | 100.0% | 100.0% | +2,633 | 0.0pp |