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, 60 to 64 year olds was the largest age group among residents in Kangaroo Island (DC), accounting for 8.9% (434 people). This share was higher than Regional SA (7.7%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 111 people and 2 percentage points.
Section overview
Age structure - Five year age groups
Kangaroo Island (DC) - Total persons (Usual residence)
This table summarises five year age groups for Kangaroo Island (DC) in 2021 for persons, with comparison against Regional SA and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Kangaroo Island (DC), with comparison markers for Regional SA.
0 to 4
2021 count
259
% of total
5.3%
Change from 2016
+0.1pp
259
5.3%
+0.1pp
5 to 9
2021 count
270
% of total
5.5%
Change from 2016
-0.2pp
270
5.5%
-0.2pp
10 to 14
2021 count
259
% of total
5.3%
Change from 2016
-0.4pp
259
5.3%
-0.4pp
15 to 19
2021 count
193
% of total
3.9%
Change from 2016
-0.7pp
193
3.9%
-0.7pp
20 to 24
2021 count
172
% of total
3.5%
Change from 2016
+0.2pp
172
3.5%
+0.2pp
25 to 29
2021 count
236
% of total
4.8%
Change from 2016
+1.1pp
236
4.8%
+1.1pp
30 to 34
2021 count
242
% of total
4.9%
Change from 2016
-0.7pp
242
4.9%
-0.7pp
35 to 39
2021 count
264
% of total
5.4%
Change from 2016
+0.8pp
264
5.4%
+0.8pp
40 to 44
2021 count
218
% of total
4.5%
Change from 2016
-0.8pp
218
4.5%
-0.8pp
45 to 49
2021 count
283
% of total
5.8%
Change from 2016
-1.2pp
283
5.8%
-1.2pp
50 to 54
2021 count
324
% of total
6.6%
Change from 2016
-1.1pp
324
6.6%
-1.1pp
55 to 59
2021 count
411
% of total
8.4%
Change from 2016
-0.9pp
411
8.4%
-0.9pp
60 to 64
2021 count
434
% of total
8.9%
Change from 2016
+0.2pp
434
8.9%
+0.2pp
65 to 69
2021 count
426
% of total
8.7%
Change from 2016
-0.2pp
426
8.7%
-0.2pp
70 to 74
2021 count
383
% of total
7.8%
Change from 2016
+2.0pp
383
7.8%
+2.0pp
75 to 79
2021 count
261
% of total
5.3%
Change from 2016
+1.5pp
261
5.3%
+1.5pp
80 to 84
2021 count
144
% of total
2.9%
Change from 2016
+0.7pp
144
2.9%
+0.7pp
85 and over
2021 count
119
% of total
2.4%
Change from 2016
-0.2pp
119
2.4%
-0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+16
+0.1pp
5 to 9
+2
-0.2pp
10 to 14
-7
-0.4pp
15 to 19
-21
-0.7pp
20 to 24
+15
+0.2pp
25 to 29
+62
+1.1pp
30 to 34
-19
-0.7pp
35 to 39
+46
+0.8pp
40 to 44
-32
-0.8pp
45 to 49
-45
-1.2pp
50 to 54
-38
-1.1pp
55 to 59
-25
-0.9pp
60 to 64
+25
+0.2pp
65 to 69
+9
-0.2pp
70 to 74
+111
+2.0pp
75 to 79
+82
+1.5pp
80 to 84
+39
+0.7pp
85 and over
-5
-0.2pp
Data table
Five year age groups for Kangaroo Island (DC). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Regional SA.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional SA% | Count | % | Regional SA% | Count | pp | |
| 0 to 4 | 259 | 5.3% | 4.9% | 243 | 5.2% | 5.5% | +16 | +0.1pp |
| 5 to 9 | 270 | 5.5% | 5.7% | 268 | 5.7% | 6.1% | +2 | -0.2pp |
| 10 to 14 | 259 | 5.3% | 6.1% | 266 | 5.7% | 6.0% | -7 | -0.4pp |
| 15 to 19 | 193 | 3.9% | 5.3% | 214 | 4.6% | 5.6% | -21 | -0.7pp |
| 20 to 24 | 172 | 3.5% | 4.6% | 157 | 3.3% | 4.8% | +15 | +0.2pp |
| 25 to 29 | 236 | 4.8% | 5.1% | 174 | 3.7% | 5.1% | +62 | +1.1pp |
| 30 to 34 | 242 | 4.9% | 5.4% | 261 | 5.6% | 5.3% | -19 | -0.7pp |
| 35 to 39 | 264 | 5.4% | 5.4% | 218 | 4.6% | 5.2% | +46 | +0.8pp |
| 40 to 44 | 218 | 4.5% | 5.2% | 250 | 5.3% | 5.9% | -32 | -0.8pp |
| 45 to 49 | 283 | 5.8% | 5.8% | 328 | 7.0% | 6.7% | -45 | -1.2pp |
| 50 to 54 | 324 | 6.6% | 6.7% | 362 | 7.7% | 7.1% | -38 | -1.1pp |
| 55 to 59 | 411 | 8.4% | 7.2% | 436 | 9.3% | 7.5% | -25 | -0.9pp |
| 60 to 64 | 434 | 8.9% | 7.7% | 409 | 8.7% | 7.3% | +25 | +0.2pp |
| 65 to 69 | 426 | 8.7% | 7.4% | 417 | 8.9% | 7.1% | +9 | -0.2pp |
| 70 to 74 | 383 | 7.8% | 6.8% | 272 | 5.8% | 5.5% | +111 | +2.0pp |
| 75 to 79 | 261 | 5.3% | 4.8% | 179 | 3.8% | 3.9% | +82 | +1.5pp |
| 80 to 84 | 144 | 2.9% | 3.1% | 105 | 2.2% | 2.6% | +39 | +0.7pp |
| 85 and over | 119 | 2.4% | 2.8% | 124 | 2.6% | 2.7% | -5 | -0.2pp |
| Total | 4,894 | 100.0% | 100.0% | 4,702 | 100.0% | 100.0% | +192 | 0.0pp |