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 Onkaparinga Hills, accounting for 8.9% (231 people). This share was higher than Onkaparinga (C) (6.6%). Since 2016, the biggest change was in 55 to 59 year olds, which increased by 208 people and 3.6 percentage points.
Section overview
Age structure - Five year age groups
Onkaparinga Hills - Total persons (Usual residence)
This table summarises five year age groups for Onkaparinga Hills 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 Onkaparinga Hills, with comparison markers for Onkaparinga (C).
0 to 4
2021 count
103
% of total
3.9%
Change from 2016
-1.4pp
103
3.9%
-1.4pp
5 to 9
2021 count
135
% of total
5.2%
Change from 2016
-3.3pp
135
5.2%
-3.3pp
10 to 14
2021 count
182
% of total
7.0%
Change from 2016
+2.3pp
182
7.0%
+2.3pp
15 to 19
2021 count
201
% of total
7.7%
Change from 2016
+3.3pp
201
7.7%
+3.3pp
20 to 24
2021 count
158
% of total
6.1%
Change from 2016
+0.1pp
158
6.1%
+0.1pp
25 to 29
2021 count
123
% of total
4.7%
Change from 2016
+3.8pp
123
4.7%
+3.8pp
30 to 34
2021 count
111
% of total
4.3%
Change from 2016
+0.2pp
111
4.3%
+0.2pp
35 to 39
2021 count
146
% of total
5.6%
Change from 2016
-1.0pp
146
5.6%
-1.0pp
40 to 44
2021 count
146
% of total
5.6%
Change from 2016
-3.2pp
146
5.6%
-3.2pp
45 to 49
2021 count
185
% of total
7.1%
Change from 2016
+0.5pp
185
7.1%
+0.5pp
50 to 54
2021 count
231
% of total
8.9%
Change from 2016
-1.2pp
231
8.9%
-1.2pp
55 to 59
2021 count
224
% of total
8.6%
Change from 2016
+3.6pp
224
8.6%
+3.6pp
60 to 64
2021 count
213
% of total
8.2%
Change from 2016
+1.3pp
213
8.2%
+1.3pp
65 to 69
2021 count
174
% of total
6.7%
Change from 2016
+1.0pp
174
6.7%
+1.0pp
70 to 74
2021 count
142
% of total
5.4%
Change from 2016
+4.5pp
142
5.4%
+4.5pp
75 to 79
2021 count
92
% of total
3.5%
Change from 2016
+0.4pp
92
3.5%
+0.4pp
80 to 84
2021 count
45
% of total
1.7%
Change from 2016
-0.5pp
45
1.7%
-0.5pp
85 and over
2021 count
15
% of total
0.6%
Change from 2016
-0.3pp
15
0.6%
-0.3pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+86
-1.4pp
5 to 9
+108
-3.3pp
10 to 14
+167
+2.3pp
15 to 19
+187
+3.3pp
20 to 24
+139
+0.1pp
25 to 29
+120
+3.8pp
30 to 34
+98
+0.2pp
35 to 39
+125
-1.0pp
40 to 44
+118
-3.2pp
45 to 49
+164
+0.5pp
50 to 54
+199
-1.2pp
55 to 59
+208
+3.6pp
60 to 64
+191
+1.3pp
65 to 69
+156
+1.0pp
70 to 74
+139
+4.5pp
75 to 79
+82
+0.4pp
80 to 84
+38
-0.5pp
85 and over
+12
-0.3pp
Data table
Five year age groups for Onkaparinga Hills. 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 | 103 | 3.9% | 5.4% | 17 | 5.3% | 6.2% | +86 | -1.4pp |
| 5 to 9 | 135 | 5.2% | 6.2% | 27 | 8.5% | 6.4% | +108 | -3.3pp |
| 10 to 14 | 182 | 7.0% | 6.2% | 15 | 4.7% | 6.1% | +167 | +2.3pp |
| 15 to 19 | 201 | 7.7% | 5.8% | 14 | 4.4% | 6.2% | +187 | +3.3pp |
| 20 to 24 | 158 | 6.1% | 5.6% | 19 | 6.0% | 6.0% | +139 | +0.1pp |
| 25 to 29 | 123 | 4.7% | 6.0% | 3 | 0.9% | 5.9% | +120 | +3.8pp |
| 30 to 34 | 111 | 4.3% | 6.3% | 13 | 4.1% | 6.5% | +98 | +0.2pp |
| 35 to 39 | 146 | 5.6% | 6.7% | 21 | 6.6% | 6.3% | +125 | -1.0pp |
| 40 to 44 | 146 | 5.6% | 6.1% | 28 | 8.8% | 6.6% | +118 | -3.2pp |
| 45 to 49 | 185 | 7.1% | 6.4% | 21 | 6.6% | 6.9% | +164 | +0.5pp |
| 50 to 54 | 231 | 8.9% | 6.6% | 32 | 10.1% | 6.7% | +199 | -1.2pp |
| 55 to 59 | 224 | 8.6% | 6.5% | 16 | 5.0% | 6.6% | +208 | +3.6pp |
| 60 to 64 | 213 | 8.2% | 6.3% | 22 | 6.9% | 6.3% | +191 | +1.3pp |
| 65 to 69 | 174 | 6.7% | 5.9% | 18 | 5.7% | 6.1% | +156 | +1.0pp |
| 70 to 74 | 142 | 5.4% | 5.7% | 3 | 0.9% | 4.3% | +139 | +4.5pp |
| 75 to 79 | 92 | 3.5% | 3.8% | 10 | 3.1% | 2.8% | +82 | +0.4pp |
| 80 to 84 | 45 | 1.7% | 2.3% | 7 | 2.2% | 2.0% | +38 | -0.5pp |
| 85 and over | 15 | 0.6% | 2.2% | 3 | 0.9% | 2.1% | +12 | -0.3pp |
| Total | 2,610 | 100.0% | 100.0% | 318 | 100.0% | 100.0% | +2,292 | 0.0pp |