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, 15 to 19 year olds was the largest age group among residents in Darlington (SA) (part), accounting for 8% (102 people). This share was higher than Onkaparinga (C) (5.8%). Since 2016, the biggest change was in 0 to 4 year olds, which decreased by 540 people and 4 percentage points.
Section overview
Age structure - Five year age groups
Darlington (SA) (part) - Total persons (Usual residence)
This table summarises five year age groups for Darlington (SA) (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 Darlington (SA) (part), with comparison markers for Onkaparinga (C).
0 to 4
2021 count
69
% of total
5.4%
Change from 2016
-4.0pp
69
5.4%
-4.0pp
5 to 9
2021 count
64
% of total
5.0%
Change from 2016
-3.5pp
64
5.0%
-3.5pp
10 to 14
2021 count
69
% of total
5.4%
Change from 2016
-0.6pp
69
5.4%
-0.6pp
15 to 19
2021 count
102
% of total
8.0%
Change from 2016
+1.4pp
102
8.0%
+1.4pp
20 to 24
2021 count
94
% of total
7.4%
Change from 2016
-0.1pp
94
7.4%
-0.1pp
25 to 29
2021 count
85
% of total
6.7%
Change from 2016
-1.1pp
85
6.7%
-1.1pp
30 to 34
2021 count
102
% of total
8.0%
Change from 2016
+0.6pp
102
8.0%
+0.6pp
35 to 39
2021 count
91
% of total
7.1%
Change from 2016
+1.6pp
91
7.1%
+1.6pp
40 to 44
2021 count
98
% of total
7.7%
Change from 2016
+2.3pp
98
7.7%
+2.3pp
45 to 49
2021 count
76
% of total
6.0%
Change from 2016
+0.4pp
76
6.0%
+0.4pp
50 to 54
2021 count
78
% of total
6.1%
Change from 2016
-0.4pp
78
6.1%
-0.4pp
55 to 59
2021 count
80
% of total
6.3%
Change from 2016
+0.2pp
80
6.3%
+0.2pp
60 to 64
2021 count
69
% of total
5.4%
Change from 2016
+0.9pp
69
5.4%
+0.9pp
65 to 69
2021 count
57
% of total
4.5%
Change from 2016
+0.7pp
57
4.5%
+0.7pp
70 to 74
2021 count
64
% of total
5.0%
Change from 2016
+1.7pp
64
5.0%
+1.7pp
75 to 79
2021 count
48
% of total
3.8%
Change from 2016
+1.2pp
48
3.8%
+1.2pp
80 to 84
2021 count
25
% of total
2.0%
Change from 2016
-0.1pp
25
2.0%
-0.1pp
85 and over
2021 count
28
% of total
2.2%
Change from 2016
+0.5pp
28
2.2%
+0.5pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-540
-4.0pp
5 to 9
-485
-3.5pp
10 to 14
-323
-0.6pp
15 to 19
-326
+1.4pp
20 to 24
-393
-0.1pp
25 to 29
-424
-1.1pp
30 to 34
-377
+0.6pp
35 to 39
-265
+1.6pp
40 to 44
-251
+2.3pp
45 to 49
-288
+0.4pp
50 to 54
-347
-0.4pp
55 to 59
-317
+0.2pp
60 to 64
-226
+0.9pp
65 to 69
-190
+0.7pp
70 to 74
-149
+1.7pp
75 to 79
-121
+1.2pp
80 to 84
-110
-0.1pp
85 and over
-80
+0.5pp
Data table
Five year age groups for Darlington (SA) (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 | 69 | 5.4% | 5.4% | 609 | 9.4% | 6.2% | -540 | -4.0pp |
| 5 to 9 | 64 | 5.0% | 6.2% | 549 | 8.5% | 6.4% | -485 | -3.5pp |
| 10 to 14 | 69 | 5.4% | 6.2% | 392 | 6.0% | 6.1% | -323 | -0.6pp |
| 15 to 19 | 102 | 8.0% | 5.8% | 428 | 6.6% | 6.2% | -326 | +1.4pp |
| 20 to 24 | 94 | 7.4% | 5.6% | 487 | 7.5% | 6.0% | -393 | -0.1pp |
| 25 to 29 | 85 | 6.7% | 6.0% | 509 | 7.8% | 5.9% | -424 | -1.1pp |
| 30 to 34 | 102 | 8.0% | 6.3% | 479 | 7.4% | 6.5% | -377 | +0.6pp |
| 35 to 39 | 91 | 7.1% | 6.7% | 356 | 5.5% | 6.3% | -265 | +1.6pp |
| 40 to 44 | 98 | 7.7% | 6.1% | 349 | 5.4% | 6.6% | -251 | +2.3pp |
| 45 to 49 | 76 | 6.0% | 6.4% | 364 | 5.6% | 6.9% | -288 | +0.4pp |
| 50 to 54 | 78 | 6.1% | 6.6% | 425 | 6.5% | 6.7% | -347 | -0.4pp |
| 55 to 59 | 80 | 6.3% | 6.5% | 397 | 6.1% | 6.6% | -317 | +0.2pp |
| 60 to 64 | 69 | 5.4% | 6.3% | 295 | 4.5% | 6.3% | -226 | +0.9pp |
| 65 to 69 | 57 | 4.5% | 5.9% | 247 | 3.8% | 6.1% | -190 | +0.7pp |
| 70 to 74 | 64 | 5.0% | 5.7% | 213 | 3.3% | 4.3% | -149 | +1.7pp |
| 75 to 79 | 48 | 3.8% | 3.8% | 169 | 2.6% | 2.8% | -121 | +1.2pp |
| 80 to 84 | 25 | 2.0% | 2.3% | 135 | 2.1% | 2.0% | -110 | -0.1pp |
| 85 and over | 28 | 2.2% | 2.2% | 108 | 1.7% | 2.1% | -80 | +0.5pp |
| Total | 1,275 | 100.0% | 100.0% | 6,497 | 100.0% | 100.0% | -5,222 | 0.0pp |