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 Northern Areas (DC), accounting for 8.8% (399 people). This share was higher than Regional SA (7.7%). Since 2016, the biggest change was in 75 to 79 year olds, which increased by 66 people and 1.4 percentage points.
Section overview
Age structure - Five year age groups
Northern Areas (DC) - Total persons (Usual residence)
This table summarises five year age groups for Northern Areas (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 Northern Areas (DC), with comparison markers for Regional SA.
0 to 4
2021 count
245
% of total
5.4%
Change from 2016
-0.8pp
245
5.4%
-0.8pp
5 to 9
2021 count
305
% of total
6.7%
Change from 2016
+0.8pp
305
6.7%
+0.8pp
10 to 14
2021 count
263
% of total
5.8%
Change from 2016
+0.2pp
263
5.8%
+0.2pp
15 to 19
2021 count
207
% of total
4.5%
Change from 2016
-0.5pp
207
4.5%
-0.5pp
20 to 24
2021 count
195
% of total
4.3%
Change from 2016
-0.3pp
195
4.3%
-0.3pp
25 to 29
2021 count
197
% of total
4.3%
Change from 2016
+0.2pp
197
4.3%
+0.2pp
30 to 34
2021 count
206
% of total
4.5%
Change from 2016
-0.4pp
206
4.5%
-0.4pp
35 to 39
2021 count
235
% of total
5.2%
Change from 2016
+0.3pp
235
5.2%
+0.3pp
40 to 44
2021 count
232
% of total
5.1%
Change from 2016
+0.3pp
232
5.1%
+0.3pp
45 to 49
2021 count
228
% of total
5.0%
Change from 2016
-0.9pp
228
5.0%
-0.9pp
50 to 54
2021 count
305
% of total
6.7%
Change from 2016
-1.1pp
305
6.7%
-1.1pp
55 to 59
2021 count
357
% of total
7.8%
Change from 2016
-0.9pp
357
7.8%
-0.9pp
60 to 64
2021 count
399
% of total
8.8%
Change from 2016
+0.8pp
399
8.8%
+0.8pp
65 to 69
2021 count
373
% of total
8.2%
Change from 2016
+0.2pp
373
8.2%
+0.2pp
70 to 74
2021 count
307
% of total
6.7%
Change from 2016
+0.7pp
307
6.7%
+0.7pp
75 to 79
2021 count
241
% of total
5.3%
Change from 2016
+1.4pp
241
5.3%
+1.4pp
80 to 84
2021 count
140
% of total
3.1%
Change from 2016
+0.4pp
140
3.1%
+0.4pp
85 and over
2021 count
131
% of total
2.9%
Change from 2016
-0.2pp
131
2.9%
-0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-34
-0.8pp
5 to 9
+40
+0.8pp
10 to 14
+9
+0.2pp
15 to 19
-21
-0.5pp
20 to 24
-15
-0.3pp
25 to 29
+10
+0.2pp
30 to 34
-15
-0.4pp
35 to 39
+12
+0.3pp
40 to 44
+13
+0.3pp
45 to 49
-37
-0.9pp
50 to 54
-47
-1.1pp
55 to 59
-36
-0.9pp
60 to 64
+39
+0.8pp
65 to 69
+9
+0.2pp
70 to 74
+34
+0.7pp
75 to 79
+66
+1.4pp
80 to 84
+17
+0.4pp
85 and over
-10
-0.2pp
Data table
Five year age groups for Northern Areas (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 | 245 | 5.4% | 4.9% | 279 | 6.2% | 5.5% | -34 | -0.8pp |
| 5 to 9 | 305 | 6.7% | 5.7% | 265 | 5.9% | 6.1% | +40 | +0.8pp |
| 10 to 14 | 263 | 5.8% | 6.1% | 254 | 5.6% | 6.0% | +9 | +0.2pp |
| 15 to 19 | 207 | 4.5% | 5.3% | 228 | 5.0% | 5.6% | -21 | -0.5pp |
| 20 to 24 | 195 | 4.3% | 4.6% | 210 | 4.6% | 4.8% | -15 | -0.3pp |
| 25 to 29 | 197 | 4.3% | 5.1% | 187 | 4.1% | 5.1% | +10 | +0.2pp |
| 30 to 34 | 206 | 4.5% | 5.4% | 221 | 4.9% | 5.3% | -15 | -0.4pp |
| 35 to 39 | 235 | 5.2% | 5.4% | 223 | 4.9% | 5.2% | +12 | +0.3pp |
| 40 to 44 | 232 | 5.1% | 5.2% | 219 | 4.8% | 5.9% | +13 | +0.3pp |
| 45 to 49 | 228 | 5.0% | 5.8% | 265 | 5.9% | 6.7% | -37 | -0.9pp |
| 50 to 54 | 305 | 6.7% | 6.7% | 352 | 7.8% | 7.1% | -47 | -1.1pp |
| 55 to 59 | 357 | 7.8% | 7.2% | 393 | 8.7% | 7.5% | -36 | -0.9pp |
| 60 to 64 | 399 | 8.8% | 7.7% | 360 | 8.0% | 7.3% | +39 | +0.8pp |
| 65 to 69 | 373 | 8.2% | 7.4% | 364 | 8.0% | 7.1% | +9 | +0.2pp |
| 70 to 74 | 307 | 6.7% | 6.8% | 273 | 6.0% | 5.5% | +34 | +0.7pp |
| 75 to 79 | 241 | 5.3% | 4.8% | 175 | 3.9% | 3.9% | +66 | +1.4pp |
| 80 to 84 | 140 | 3.1% | 3.1% | 123 | 2.7% | 2.6% | +17 | +0.4pp |
| 85 and over | 131 | 2.9% | 2.8% | 141 | 3.1% | 2.7% | -10 | -0.2pp |
| Total | 4,559 | 100.0% | 100.0% | 4,524 | 100.0% | 100.0% | +35 | 0.0pp |