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, 65 to 69 year olds was the largest age group among residents in Northampton (S), accounting for 9.9% (318 people). This share was higher than Regional WA (5.7%). Since 2016, the biggest change was in 75 to 79 year olds, which increased by 60 people and 2 percentage points.
Section overview
Age structure - Five year age groups
Northampton (S) - Total persons (Usual residence)
This table summarises five year age groups for Northampton (S) in 2021 for persons, with comparison against Regional WA and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Northampton (S), with comparison markers for Regional WA.
0 to 4
2021 count
130
% of total
4.0%
Change from 2016
-0.5pp
130
4.0%
-0.5pp
5 to 9
2021 count
182
% of total
5.6%
Change from 2016
0.0pp
182
5.6%
0.0pp
10 to 14
2021 count
159
% of total
4.9%
Change from 2016
-0.2pp
159
4.9%
-0.2pp
15 to 19
2021 count
113
% of total
3.5%
Change from 2016
-0.6pp
113
3.5%
-0.6pp
20 to 24
2021 count
96
% of total
3.0%
Change from 2016
-0.9pp
96
3.0%
-0.9pp
25 to 29
2021 count
95
% of total
2.9%
Change from 2016
-0.4pp
95
2.9%
-0.4pp
30 to 34
2021 count
156
% of total
4.8%
Change from 2016
+0.8pp
156
4.8%
+0.8pp
35 to 39
2021 count
164
% of total
5.1%
Change from 2016
+0.5pp
164
5.1%
+0.5pp
40 to 44
2021 count
169
% of total
5.2%
Change from 2016
-0.7pp
169
5.2%
-0.7pp
45 to 49
2021 count
184
% of total
5.7%
Change from 2016
-1.6pp
184
5.7%
-1.6pp
50 to 54
2021 count
224
% of total
6.9%
Change from 2016
-1.2pp
224
6.9%
-1.2pp
55 to 59
2021 count
281
% of total
8.7%
Change from 2016
-0.7pp
281
8.7%
-0.7pp
60 to 64
2021 count
314
% of total
9.7%
Change from 2016
-0.7pp
314
9.7%
-0.7pp
65 to 69
2021 count
318
% of total
9.9%
Change from 2016
+1.2pp
318
9.9%
+1.2pp
70 to 74
2021 count
271
% of total
8.4%
Change from 2016
+1.5pp
271
8.4%
+1.5pp
75 to 79
2021 count
187
% of total
5.8%
Change from 2016
+2.0pp
187
5.8%
+2.0pp
80 to 84
2021 count
95
% of total
2.9%
Change from 2016
+0.7pp
95
2.9%
+0.7pp
85 and over
2021 count
82
% of total
2.5%
Change from 2016
+0.6pp
82
2.5%
+0.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-19
-0.5pp
5 to 9
-4
0.0pp
10 to 14
-10
-0.2pp
15 to 19
-22
-0.6pp
20 to 24
-34
-0.9pp
25 to 29
-16
-0.4pp
30 to 34
+23
+0.8pp
35 to 39
+12
+0.5pp
40 to 44
-28
-0.7pp
45 to 49
-57
-1.6pp
50 to 54
-46
-1.2pp
55 to 59
-30
-0.7pp
60 to 64
-30
-0.7pp
65 to 69
+29
+1.2pp
70 to 74
+42
+1.5pp
75 to 79
+60
+2.0pp
80 to 84
+23
+0.7pp
85 and over
+18
+0.6pp
Data table
Five year age groups for Northampton (S). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Regional WA.
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Regional WA% | Count | % | Regional WA% | Count | pp | |
| 0 to 4 | 130 | 4.0% | 6.0% | 149 | 4.5% | 6.6% | -19 | -0.5pp |
| 5 to 9 | 182 | 5.6% | 6.7% | 186 | 5.6% | 7.1% | -4 | 0.0pp |
| 10 to 14 | 159 | 4.9% | 6.7% | 169 | 5.1% | 6.5% | -10 | -0.2pp |
| 15 to 19 | 113 | 3.5% | 5.5% | 135 | 4.1% | 5.7% | -22 | -0.6pp |
| 20 to 24 | 96 | 3.0% | 4.8% | 130 | 3.9% | 5.0% | -34 | -0.9pp |
| 25 to 29 | 95 | 2.9% | 5.9% | 111 | 3.3% | 6.5% | -16 | -0.4pp |
| 30 to 34 | 156 | 4.8% | 6.6% | 133 | 4.0% | 7.1% | +23 | +0.8pp |
| 35 to 39 | 164 | 5.1% | 6.8% | 152 | 4.6% | 6.7% | +12 | +0.5pp |
| 40 to 44 | 169 | 5.2% | 6.4% | 197 | 5.9% | 7.0% | -28 | -0.7pp |
| 45 to 49 | 184 | 5.7% | 6.6% | 241 | 7.3% | 7.2% | -57 | -1.6pp |
| 50 to 54 | 224 | 6.9% | 6.9% | 270 | 8.1% | 7.1% | -46 | -1.2pp |
| 55 to 59 | 281 | 8.7% | 6.8% | 311 | 9.4% | 6.9% | -30 | -0.7pp |
| 60 to 64 | 314 | 9.7% | 6.7% | 344 | 10.4% | 6.0% | -30 | -0.7pp |
| 65 to 69 | 318 | 9.9% | 5.7% | 289 | 8.7% | 5.3% | +29 | +1.2pp |
| 70 to 74 | 271 | 8.4% | 4.9% | 229 | 6.9% | 3.6% | +42 | +1.5pp |
| 75 to 79 | 187 | 5.8% | 3.2% | 127 | 3.8% | 2.6% | +60 | +2.0pp |
| 80 to 84 | 95 | 2.9% | 2.0% | 72 | 2.2% | 1.6% | +23 | +0.7pp |
| 85 and over | 82 | 2.5% | 1.7% | 64 | 1.9% | 1.5% | +18 | +0.6pp |
| Total | 3,227 | 100.0% | 100.0% | 3,319 | 100.0% | 100.0% | -92 | 0.0pp |