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 Reynella (part), accounting for 8.4% (404 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 74 people and 1.5 percentage points.
Section overview
Age structure - Five year age groups
Reynella (part) - Total persons (Usual residence)
This table summarises five year age groups for Reynella (part) 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 Reynella (part), with comparison markers for Onkaparinga (C).
0 to 4
2021 count
298
% of total
6.2%
Change from 2016
-1.0pp
298
6.2%
-1.0pp
5 to 9
2021 count
301
% of total
6.2%
Change from 2016
+0.2pp
301
6.2%
+0.2pp
10 to 14
2021 count
281
% of total
5.8%
Change from 2016
+0.7pp
281
5.8%
+0.7pp
15 to 19
2021 count
237
% of total
4.9%
Change from 2016
-0.4pp
237
4.9%
-0.4pp
20 to 24
2021 count
290
% of total
6.0%
Change from 2016
+0.3pp
290
6.0%
+0.3pp
25 to 29
2021 count
348
% of total
7.2%
Change from 2016
-1.0pp
348
7.2%
-1.0pp
30 to 34
2021 count
403
% of total
8.3%
Change from 2016
-0.7pp
403
8.3%
-0.7pp
35 to 39
2021 count
404
% of total
8.4%
Change from 2016
+1.2pp
404
8.4%
+1.2pp
40 to 44
2021 count
326
% of total
6.7%
Change from 2016
+0.3pp
326
6.7%
+0.3pp
45 to 49
2021 count
277
% of total
5.7%
Change from 2016
0.0pp
277
5.7%
0.0pp
50 to 54
2021 count
259
% of total
5.4%
Change from 2016
-0.6pp
259
5.4%
-0.6pp
55 to 59
2021 count
274
% of total
5.7%
Change from 2016
-0.2pp
274
5.7%
-0.2pp
60 to 64
2021 count
265
% of total
5.5%
Change from 2016
0.0pp
265
5.5%
0.0pp
65 to 69
2021 count
241
% of total
5.0%
Change from 2016
-1.6pp
241
5.0%
-1.6pp
70 to 74
2021 count
279
% of total
5.8%
Change from 2016
+1.5pp
279
5.8%
+1.5pp
75 to 79
2021 count
168
% of total
3.5%
Change from 2016
0.0pp
168
3.5%
0.0pp
80 to 84
2021 count
116
% of total
2.4%
Change from 2016
+0.9pp
116
2.4%
+0.9pp
85 and over
2021 count
72
% of total
1.5%
Change from 2016
-0.1pp
72
1.5%
-0.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-45
-1.0pp
5 to 9
+18
+0.2pp
10 to 14
+38
+0.7pp
15 to 19
-14
-0.4pp
20 to 24
+19
+0.3pp
25 to 29
-44
-1.0pp
30 to 34
-25
-0.7pp
35 to 39
+64
+1.2pp
40 to 44
+24
+0.3pp
45 to 49
+4
0.0pp
50 to 54
-26
-0.6pp
55 to 59
-8
-0.2pp
60 to 64
+5
0.0pp
65 to 69
-71
-1.6pp
70 to 74
+74
+1.5pp
75 to 79
+4
0.0pp
80 to 84
+43
+0.9pp
85 and over
-6
-0.1pp
Data table
Five year age groups for Reynella (part). 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 | 298 | 6.2% | 5.4% | 343 | 7.2% | 6.2% | -45 | -1.0pp |
| 5 to 9 | 301 | 6.2% | 6.2% | 283 | 6.0% | 6.4% | +18 | +0.2pp |
| 10 to 14 | 281 | 5.8% | 6.2% | 243 | 5.1% | 6.1% | +38 | +0.7pp |
| 15 to 19 | 237 | 4.9% | 5.8% | 251 | 5.3% | 6.2% | -14 | -0.4pp |
| 20 to 24 | 290 | 6.0% | 5.6% | 271 | 5.7% | 6.0% | +19 | +0.3pp |
| 25 to 29 | 348 | 7.2% | 6.0% | 392 | 8.2% | 5.9% | -44 | -1.0pp |
| 30 to 34 | 403 | 8.3% | 6.3% | 428 | 9.0% | 6.5% | -25 | -0.7pp |
| 35 to 39 | 404 | 8.4% | 6.7% | 340 | 7.2% | 6.3% | +64 | +1.2pp |
| 40 to 44 | 326 | 6.7% | 6.1% | 302 | 6.4% | 6.6% | +24 | +0.3pp |
| 45 to 49 | 277 | 5.7% | 6.4% | 273 | 5.7% | 6.9% | +4 | 0.0pp |
| 50 to 54 | 259 | 5.4% | 6.6% | 285 | 6.0% | 6.7% | -26 | -0.6pp |
| 55 to 59 | 274 | 5.7% | 6.5% | 282 | 5.9% | 6.6% | -8 | -0.2pp |
| 60 to 64 | 265 | 5.5% | 6.3% | 260 | 5.5% | 6.3% | +5 | 0.0pp |
| 65 to 69 | 241 | 5.0% | 5.9% | 312 | 6.6% | 6.1% | -71 | -1.6pp |
| 70 to 74 | 279 | 5.8% | 5.7% | 205 | 4.3% | 4.3% | +74 | +1.5pp |
| 75 to 79 | 168 | 3.5% | 3.8% | 164 | 3.5% | 2.8% | +4 | 0.0pp |
| 80 to 84 | 116 | 2.4% | 2.3% | 73 | 1.5% | 2.0% | +43 | +0.9pp |
| 85 and over | 72 | 1.5% | 2.2% | 78 | 1.6% | 2.1% | -6 | -0.1pp |
| Total | 4,836 | 100.0% | 100.0% | 4,753 | 100.0% | 100.0% | +83 | 0.0pp |