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, 55 to 59 year olds was the largest age group among residents in Unincorporated SA, accounting for 9.1% (275 people). This share was higher than Regional SA (7.2%). Since 2016, the biggest change was in 40 to 44 year olds, which decreased by 119 people and 2.6 percentage points.
Section overview
Age structure - Five year age groups
Unincorporated SA - Total persons (Usual residence)
This table summarises five year age groups for Unincorporated SA in 2021 for persons, with comparison against Regional SA and change since 2016.
Chart view
Age structure - Five year age groups snapshot
2021 distribution by category for Unincorporated SA, with comparison markers for Regional SA.
0 to 4
2021 count
145
% of total
4.8%
Change from 2016
+0.5pp
145
4.8%
+0.5pp
5 to 9
2021 count
162
% of total
5.4%
Change from 2016
+0.8pp
162
5.4%
+0.8pp
10 to 14
2021 count
139
% of total
4.6%
Change from 2016
-0.2pp
139
4.6%
-0.2pp
15 to 19
2021 count
152
% of total
5.1%
Change from 2016
+1.0pp
152
5.1%
+1.0pp
20 to 24
2021 count
212
% of total
7.1%
Change from 2016
+2.5pp
212
7.1%
+2.5pp
25 to 29
2021 count
241
% of total
8.0%
Change from 2016
+0.3pp
241
8.0%
+0.3pp
30 to 34
2021 count
194
% of total
6.5%
Change from 2016
-1.3pp
194
6.5%
-1.3pp
35 to 39
2021 count
197
% of total
6.6%
Change from 2016
+0.2pp
197
6.6%
+0.2pp
40 to 44
2021 count
154
% of total
5.1%
Change from 2016
-2.6pp
154
5.1%
-2.6pp
45 to 49
2021 count
224
% of total
7.5%
Change from 2016
-1.3pp
224
7.5%
-1.3pp
50 to 54
2021 count
274
% of total
9.1%
Change from 2016
-0.5pp
274
9.1%
-0.5pp
55 to 59
2021 count
275
% of total
9.1%
Change from 2016
+0.2pp
275
9.1%
+0.2pp
60 to 64
2021 count
245
% of total
8.2%
Change from 2016
+0.7pp
245
8.2%
+0.7pp
65 to 69
2021 count
184
% of total
6.1%
Change from 2016
+1.0pp
184
6.1%
+1.0pp
70 to 74
2021 count
107
% of total
3.6%
Change from 2016
+0.2pp
107
3.6%
+0.2pp
75 to 79
2021 count
63
% of total
2.1%
Change from 2016
+0.2pp
63
2.1%
+0.2pp
80 to 84
2021 count
29
% of total
1.0%
Change from 2016
-0.2pp
29
1.0%
-0.2pp
85 and over
2021 count
24
% of total
0.8%
Change from 2016
+0.2pp
24
0.8%
+0.2pp
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-6
+0.5pp
5 to 9
-1
+0.8pp
10 to 14
-30
-0.2pp
15 to 19
+8
+1.0pp
20 to 24
+51
+2.5pp
25 to 29
-31
+0.3pp
30 to 34
-82
-1.3pp
35 to 39
-30
+0.2pp
40 to 44
-119
-2.6pp
45 to 49
-85
-1.3pp
50 to 54
-63
-0.5pp
55 to 59
-37
+0.2pp
60 to 64
-19
+0.7pp
65 to 69
+4
+1.0pp
70 to 74
-14
+0.2pp
75 to 79
-3
+0.2pp
80 to 84
-12
-0.2pp
85 and over
+3
+0.2pp
Data table
Five year age groups for Unincorporated SA. 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 | 145 | 4.8% | 4.9% | 151 | 4.3% | 5.5% | -6 | +0.5pp |
| 5 to 9 | 162 | 5.4% | 5.7% | 163 | 4.6% | 6.1% | -1 | +0.8pp |
| 10 to 14 | 139 | 4.6% | 6.1% | 169 | 4.8% | 6.0% | -30 | -0.2pp |
| 15 to 19 | 152 | 5.1% | 5.3% | 144 | 4.1% | 5.6% | +8 | +1.0pp |
| 20 to 24 | 212 | 7.1% | 4.6% | 161 | 4.6% | 4.8% | +51 | +2.5pp |
| 25 to 29 | 241 | 8.0% | 5.1% | 272 | 7.7% | 5.1% | -31 | +0.3pp |
| 30 to 34 | 194 | 6.5% | 5.4% | 276 | 7.8% | 5.3% | -82 | -1.3pp |
| 35 to 39 | 197 | 6.6% | 5.4% | 227 | 6.4% | 5.2% | -30 | +0.2pp |
| 40 to 44 | 154 | 5.1% | 5.2% | 273 | 7.7% | 5.9% | -119 | -2.6pp |
| 45 to 49 | 224 | 7.5% | 5.8% | 309 | 8.8% | 6.7% | -85 | -1.3pp |
| 50 to 54 | 274 | 9.1% | 6.7% | 337 | 9.6% | 7.1% | -63 | -0.5pp |
| 55 to 59 | 275 | 9.1% | 7.2% | 312 | 8.9% | 7.5% | -37 | +0.2pp |
| 60 to 64 | 245 | 8.2% | 7.7% | 264 | 7.5% | 7.3% | -19 | +0.7pp |
| 65 to 69 | 184 | 6.1% | 7.4% | 180 | 5.1% | 7.1% | +4 | +1.0pp |
| 70 to 74 | 107 | 3.6% | 6.8% | 121 | 3.4% | 5.5% | -14 | +0.2pp |
| 75 to 79 | 63 | 2.1% | 4.8% | 66 | 1.9% | 3.9% | -3 | +0.2pp |
| 80 to 84 | 29 | 1.0% | 3.1% | 41 | 1.2% | 2.6% | -12 | -0.2pp |
| 85 and over | 24 | 0.8% | 2.8% | 21 | 0.6% | 2.7% | +3 | +0.2pp |
| Total | 3,006 | 100.0% | 100.0% | 3,524 | 100.0% | 100.0% | -518 | 0.0pp |