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, 25 to 29 year olds was the largest age group among residents in Narrogin, accounting for 6.7% (265 people). This share was higher than Narrogin (S) (6%). Since 2016, the biggest change was in 5 to 9 year olds, which decreased by 92 people and 1.7 percentage points.
Section overview
Age structure - Five year age groups
Narrogin - Total persons (Usual residence)
This table summarises five year age groups for Narrogin in 2021 for persons, with comparison against Narrogin (S) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Narrogin, with comparison markers for Narrogin (S).
0 to 4
2021 count
196
% of total
5.0%
Change from 2016
-1.5pp
196
5.0%
-1.5pp
5 to 9
2021 count
229
% of total
5.8%
Change from 2016
-1.7pp
229
5.8%
-1.7pp
10 to 14
2021 count
255
% of total
6.5%
Change from 2016
-0.9pp
255
6.5%
-0.9pp
15 to 19
2021 count
230
% of total
5.9%
Change from 2016
-1.2pp
230
5.9%
-1.2pp
20 to 24
2021 count
231
% of total
5.9%
Change from 2016
+0.2pp
231
5.9%
+0.2pp
25 to 29
2021 count
265
% of total
6.7%
Change from 2016
+1.1pp
265
6.7%
+1.1pp
30 to 34
2021 count
220
% of total
5.6%
Change from 2016
-0.3pp
220
5.6%
-0.3pp
35 to 39
2021 count
241
% of total
6.1%
Change from 2016
+1.3pp
241
6.1%
+1.3pp
40 to 44
2021 count
188
% of total
4.8%
Change from 2016
-1.0pp
188
4.8%
-1.0pp
45 to 49
2021 count
229
% of total
5.8%
Change from 2016
-0.6pp
229
5.8%
-0.6pp
50 to 54
2021 count
253
% of total
6.4%
Change from 2016
+0.7pp
253
6.4%
+0.7pp
55 to 59
2021 count
248
% of total
6.3%
Change from 2016
-0.7pp
248
6.3%
-0.7pp
60 to 64
2021 count
262
% of total
6.7%
Change from 2016
+0.5pp
262
6.7%
+0.5pp
65 to 69
2021 count
235
% of total
6.0%
Change from 2016
+0.4pp
235
6.0%
+0.4pp
70 to 74
2021 count
215
% of total
5.5%
Change from 2016
+1.4pp
215
5.5%
+1.4pp
75 to 79
2021 count
160
% of total
4.1%
Change from 2016
+0.7pp
160
4.1%
+0.7pp
80 to 84
2021 count
117
% of total
3.0%
Change from 2016
+0.3pp
117
3.0%
+0.3pp
85 and over
2021 count
144
% of total
3.7%
Change from 2016
+0.6pp
144
3.7%
+0.6pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-80
-1.5pp
5 to 9
-92
-1.7pp
10 to 14
-63
-0.9pp
15 to 19
-72
-1.2pp
20 to 24
-13
+0.2pp
25 to 29
+25
+1.1pp
30 to 34
-34
-0.3pp
35 to 39
+34
+1.3pp
40 to 44
-58
-1.0pp
45 to 49
-44
-0.6pp
50 to 54
+10
+0.7pp
55 to 59
-53
-0.7pp
60 to 64
-5
+0.5pp
65 to 69
-6
+0.4pp
70 to 74
+38
+1.4pp
75 to 79
+15
+0.7pp
80 to 84
0
+0.3pp
85 and over
+12
+0.6pp
Data table
Five year age groups for Narrogin. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Narrogin (S).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Narrogin (S)% | Count | % | Narrogin (S)% | Count | pp | |
| 0 to 4 | 196 | 5.0% | 4.8% | 276 | 6.5% | 6.3% | -80 | -1.5pp |
| 5 to 9 | 229 | 5.8% | 5.9% | 321 | 7.5% | 7.3% | -92 | -1.7pp |
| 10 to 14 | 255 | 6.5% | 6.7% | 318 | 7.4% | 7.0% | -63 | -0.9pp |
| 15 to 19 | 230 | 5.9% | 7.0% | 302 | 7.1% | 7.5% | -72 | -1.2pp |
| 20 to 24 | 231 | 5.9% | 5.4% | 244 | 5.7% | 5.1% | -13 | +0.2pp |
| 25 to 29 | 265 | 6.7% | 6.0% | 240 | 5.6% | 5.4% | +25 | +1.1pp |
| 30 to 34 | 220 | 5.6% | 5.3% | 254 | 5.9% | 5.6% | -34 | -0.3pp |
| 35 to 39 | 241 | 6.1% | 5.9% | 207 | 4.8% | 5.1% | +34 | +1.3pp |
| 40 to 44 | 188 | 4.8% | 5.1% | 246 | 5.8% | 5.8% | -58 | -1.0pp |
| 45 to 49 | 229 | 5.8% | 5.9% | 273 | 6.4% | 6.4% | -44 | -0.6pp |
| 50 to 54 | 253 | 6.4% | 6.6% | 243 | 5.7% | 6.2% | +10 | +0.7pp |
| 55 to 59 | 248 | 6.3% | 6.6% | 301 | 7.0% | 7.4% | -53 | -0.7pp |
| 60 to 64 | 262 | 6.7% | 7.1% | 267 | 6.2% | 6.7% | -5 | +0.5pp |
| 65 to 69 | 235 | 6.0% | 6.5% | 241 | 5.6% | 5.9% | -6 | +0.4pp |
| 70 to 74 | 215 | 5.5% | 5.4% | 177 | 4.1% | 4.3% | +38 | +1.4pp |
| 75 to 79 | 160 | 4.1% | 4.2% | 145 | 3.4% | 3.1% | +15 | +0.7pp |
| 80 to 84 | 117 | 3.0% | 2.7% | 117 | 2.7% | 2.4% | 0 | +0.3pp |
| 85 and over | 144 | 3.7% | 3.2% | 132 | 3.1% | 2.6% | +12 | +0.6pp |
| Total | 3,927 | 100.0% | 100.0% | 4,274 | 100.0% | 100.0% | -347 | 0.0pp |