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, 30 to 34 year olds was the largest age group among residents in Roxby Downs (M), accounting for 11.3% (451 people). This share was higher than Regional SA (5.4%). Since 2016, the biggest change was in 35 to 39 year olds, which increased by 66 people and 1.4 percentage points.
Section overview
Age structure - Five year age groups
Roxby Downs (M) - Total persons (Usual residence)
This table summarises five year age groups for Roxby Downs (M) 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 Roxby Downs (M), with comparison markers for Regional SA.
0 to 4
2021 count
371
% of total
9.3%
Change from 2016
-1.4pp
371
9.3%
-1.4pp
5 to 9
2021 count
390
% of total
9.8%
Change from 2016
+0.9pp
390
9.8%
+0.9pp
10 to 14
2021 count
269
% of total
6.8%
Change from 2016
-0.2pp
269
6.8%
-0.2pp
15 to 19
2021 count
192
% of total
4.8%
Change from 2016
+0.9pp
192
4.8%
+0.9pp
20 to 24
2021 count
233
% of total
5.9%
Change from 2016
-0.9pp
233
5.9%
-0.9pp
25 to 29
2021 count
409
% of total
10.3%
Change from 2016
-0.4pp
409
10.3%
-0.4pp
30 to 34
2021 count
451
% of total
11.3%
Change from 2016
-1.0pp
451
11.3%
-1.0pp
35 to 39
2021 count
431
% of total
10.8%
Change from 2016
+1.4pp
431
10.8%
+1.4pp
40 to 44
2021 count
300
% of total
7.5%
Change from 2016
0.0pp
300
7.5%
0.0pp
45 to 49
2021 count
266
% of total
6.7%
Change from 2016
-0.5pp
266
6.7%
-0.5pp
50 to 54
2021 count
235
% of total
5.9%
Change from 2016
-0.6pp
235
5.9%
-0.6pp
55 to 59
2021 count
213
% of total
5.4%
Change from 2016
-0.1pp
213
5.4%
-0.1pp
60 to 64
2021 count
144
% of total
3.6%
Change from 2016
+0.8pp
144
3.6%
+0.8pp
65 to 69
2021 count
43
% of total
1.1%
Change from 2016
+0.1pp
43
1.1%
+0.1pp
70 to 74
2021 count
20
% of total
0.5%
Change from 2016
+0.3pp
20
0.5%
+0.3pp
75 to 79
2021 count
9
% of total
0.2%
Change from 2016
+0.2pp
9
0.2%
+0.2pp
80 to 84
2021 count
0
% of total
0.0%
Change from 2016
-0.1pp
0
0.0%
-0.1pp
85 and over
2021 count
0
% of total
0.0%
Change from 2016
0.0pp
0
0.0%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-43
-1.4pp
5 to 9
+46
+0.9pp
10 to 14
-3
-0.2pp
15 to 19
+40
+0.9pp
20 to 24
-32
-0.9pp
25 to 29
-6
-0.4pp
30 to 34
-26
-1.0pp
35 to 39
+66
+1.4pp
40 to 44
+7
0.0pp
45 to 49
-13
-0.5pp
50 to 54
-16
-0.6pp
55 to 59
0
-0.1pp
60 to 64
+35
+0.8pp
65 to 69
+3
+0.1pp
70 to 74
+14
+0.3pp
75 to 79
+9
+0.2pp
80 to 84
-4
-0.1pp
85 and over
0
0.0pp
Data table
Five year age groups for Roxby Downs (M). 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 | 371 | 9.3% | 4.9% | 414 | 10.7% | 5.5% | -43 | -1.4pp |
| 5 to 9 | 390 | 9.8% | 5.7% | 344 | 8.9% | 6.1% | +46 | +0.9pp |
| 10 to 14 | 269 | 6.8% | 6.1% | 272 | 7.0% | 6.0% | -3 | -0.2pp |
| 15 to 19 | 192 | 4.8% | 5.3% | 152 | 3.9% | 5.6% | +40 | +0.9pp |
| 20 to 24 | 233 | 5.9% | 4.6% | 265 | 6.8% | 4.8% | -32 | -0.9pp |
| 25 to 29 | 409 | 10.3% | 5.1% | 415 | 10.7% | 5.1% | -6 | -0.4pp |
| 30 to 34 | 451 | 11.3% | 5.4% | 477 | 12.3% | 5.3% | -26 | -1.0pp |
| 35 to 39 | 431 | 10.8% | 5.4% | 365 | 9.4% | 5.2% | +66 | +1.4pp |
| 40 to 44 | 300 | 7.5% | 5.2% | 293 | 7.5% | 5.9% | +7 | 0.0pp |
| 45 to 49 | 266 | 6.7% | 5.8% | 279 | 7.2% | 6.7% | -13 | -0.5pp |
| 50 to 54 | 235 | 5.9% | 6.7% | 251 | 6.5% | 7.1% | -16 | -0.6pp |
| 55 to 59 | 213 | 5.4% | 7.2% | 213 | 5.5% | 7.5% | 0 | -0.1pp |
| 60 to 64 | 144 | 3.6% | 7.7% | 109 | 2.8% | 7.3% | +35 | +0.8pp |
| 65 to 69 | 43 | 1.1% | 7.4% | 40 | 1.0% | 7.1% | +3 | +0.1pp |
| 70 to 74 | 20 | 0.5% | 6.8% | 6 | 0.2% | 5.5% | +14 | +0.3pp |
| 75 to 79 | 9 | 0.2% | 4.8% | 0 | 0.0% | 3.9% | +9 | +0.2pp |
| 80 to 84 | 0 | 0.0% | 3.1% | 4 | 0.1% | 2.6% | -4 | -0.1pp |
| 85 and over | 0 | 0.0% | 2.8% | 0 | 0.0% | 2.7% | 0 | 0.0pp |
| Total | 3,976 | 100.0% | 100.0% | 3,884 | 100.0% | 100.0% | +92 | 0.0pp |