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, 35 to 39 year olds was the largest age group among residents in Old Reynella, accounting for 6.9% (239 people). This share was higher than Onkaparinga (C) (6.7%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 76 people and 2.1 percentage points.
Section overview
Age structure - Five year age groups
Old Reynella - Total persons (Usual residence)
This table summarises five year age groups for Old Reynella 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 Old Reynella, with comparison markers for Onkaparinga (C).
0 to 4
2021 count
183
% of total
5.3%
Change from 2016
-1.3pp
183
5.3%
-1.3pp
5 to 9
2021 count
205
% of total
5.9%
Change from 2016
+0.3pp
205
5.9%
+0.3pp
10 to 14
2021 count
183
% of total
5.3%
Change from 2016
-0.3pp
183
5.3%
-0.3pp
15 to 19
2021 count
218
% of total
6.3%
Change from 2016
0.0pp
218
6.3%
0.0pp
20 to 24
2021 count
211
% of total
6.1%
Change from 2016
+0.1pp
211
6.1%
+0.1pp
25 to 29
2021 count
186
% of total
5.4%
Change from 2016
-1.1pp
186
5.4%
-1.1pp
30 to 34
2021 count
215
% of total
6.2%
Change from 2016
-1.0pp
215
6.2%
-1.0pp
35 to 39
2021 count
239
% of total
6.9%
Change from 2016
+0.3pp
239
6.9%
+0.3pp
40 to 44
2021 count
205
% of total
5.9%
Change from 2016
0.0pp
205
5.9%
0.0pp
45 to 49
2021 count
207
% of total
6.0%
Change from 2016
-0.8pp
207
6.0%
-0.8pp
50 to 54
2021 count
229
% of total
6.6%
Change from 2016
+0.4pp
229
6.6%
+0.4pp
55 to 59
2021 count
213
% of total
6.2%
Change from 2016
-0.6pp
213
6.2%
-0.6pp
60 to 64
2021 count
224
% of total
6.5%
Change from 2016
+0.6pp
224
6.5%
+0.6pp
65 to 69
2021 count
196
% of total
5.7%
Change from 2016
+0.3pp
196
5.7%
+0.3pp
70 to 74
2021 count
176
% of total
5.1%
Change from 2016
+2.1pp
176
5.1%
+2.1pp
75 to 79
2021 count
113
% of total
3.3%
Change from 2016
+0.6pp
113
3.3%
+0.6pp
80 to 84
2021 count
104
% of total
3.0%
Change from 2016
0.0pp
104
3.0%
0.0pp
85 and over
2021 count
157
% of total
4.5%
Change from 2016
+0.5pp
157
4.5%
+0.5pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-40
-1.3pp
5 to 9
+16
+0.3pp
10 to 14
-7
-0.3pp
15 to 19
+5
0.0pp
20 to 24
+9
+0.1pp
25 to 29
-34
-1.1pp
30 to 34
-30
-1.0pp
35 to 39
+16
+0.3pp
40 to 44
+6
0.0pp
45 to 49
-23
-0.8pp
50 to 54
+19
+0.4pp
55 to 59
-16
-0.6pp
60 to 64
+26
+0.6pp
65 to 69
+13
+0.3pp
70 to 74
+76
+2.1pp
75 to 79
+21
+0.6pp
80 to 84
+3
0.0pp
85 and over
+22
+0.5pp
Data table
Five year age groups for Old Reynella. 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 | 183 | 5.3% | 5.4% | 223 | 6.6% | 6.2% | -40 | -1.3pp |
| 5 to 9 | 205 | 5.9% | 6.2% | 189 | 5.6% | 6.4% | +16 | +0.3pp |
| 10 to 14 | 183 | 5.3% | 6.2% | 190 | 5.6% | 6.1% | -7 | -0.3pp |
| 15 to 19 | 218 | 6.3% | 5.8% | 213 | 6.3% | 6.2% | +5 | 0.0pp |
| 20 to 24 | 211 | 6.1% | 5.6% | 202 | 6.0% | 6.0% | +9 | +0.1pp |
| 25 to 29 | 186 | 5.4% | 6.0% | 220 | 6.5% | 5.9% | -34 | -1.1pp |
| 30 to 34 | 215 | 6.2% | 6.3% | 245 | 7.2% | 6.5% | -30 | -1.0pp |
| 35 to 39 | 239 | 6.9% | 6.7% | 223 | 6.6% | 6.3% | +16 | +0.3pp |
| 40 to 44 | 205 | 5.9% | 6.1% | 199 | 5.9% | 6.6% | +6 | 0.0pp |
| 45 to 49 | 207 | 6.0% | 6.4% | 230 | 6.8% | 6.9% | -23 | -0.8pp |
| 50 to 54 | 229 | 6.6% | 6.6% | 210 | 6.2% | 6.7% | +19 | +0.4pp |
| 55 to 59 | 213 | 6.2% | 6.5% | 229 | 6.8% | 6.6% | -16 | -0.6pp |
| 60 to 64 | 224 | 6.5% | 6.3% | 198 | 5.9% | 6.3% | +26 | +0.6pp |
| 65 to 69 | 196 | 5.7% | 5.9% | 183 | 5.4% | 6.1% | +13 | +0.3pp |
| 70 to 74 | 176 | 5.1% | 5.7% | 100 | 3.0% | 4.3% | +76 | +2.1pp |
| 75 to 79 | 113 | 3.3% | 3.8% | 92 | 2.7% | 2.8% | +21 | +0.6pp |
| 80 to 84 | 104 | 3.0% | 2.3% | 101 | 3.0% | 2.0% | +3 | 0.0pp |
| 85 and over | 157 | 4.5% | 2.2% | 135 | 4.0% | 2.1% | +22 | +0.5pp |
| Total | 3,458 | 100.0% | 100.0% | 3,383 | 100.0% | 100.0% | +75 | 0.0pp |