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, 10 to 14 year olds was the largest age group among residents in Dalkeith, accounting for 8.9% (390 people). This share was higher than Nedlands (C) (7.8%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 80 people and 1.6 percentage points.
Section overview
Age structure - Five year age groups
Dalkeith - Total persons (Usual residence)
This table summarises five year age groups for Dalkeith in 2021 for persons, with comparison against Nedlands (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Dalkeith, with comparison markers for Nedlands (C).
0 to 4
2021 count
151
% of total
3.4%
Change from 2016
-0.3pp
151
3.4%
-0.3pp
5 to 9
2021 count
281
% of total
6.4%
Change from 2016
-1.5pp
281
6.4%
-1.5pp
10 to 14
2021 count
390
% of total
8.9%
Change from 2016
-0.9pp
390
8.9%
-0.9pp
15 to 19
2021 count
382
% of total
8.7%
Change from 2016
-0.2pp
382
8.7%
-0.2pp
20 to 24
2021 count
273
% of total
6.2%
Change from 2016
-0.6pp
273
6.2%
-0.6pp
25 to 29
2021 count
149
% of total
3.4%
Change from 2016
+0.3pp
149
3.4%
+0.3pp
30 to 34
2021 count
109
% of total
2.5%
Change from 2016
-0.3pp
109
2.5%
-0.3pp
35 to 39
2021 count
173
% of total
3.9%
Change from 2016
-0.1pp
173
3.9%
-0.1pp
40 to 44
2021 count
284
% of total
6.5%
Change from 2016
+0.2pp
284
6.5%
+0.2pp
45 to 49
2021 count
309
% of total
7.0%
Change from 2016
-0.7pp
309
7.0%
-0.7pp
50 to 54
2021 count
364
% of total
8.3%
Change from 2016
+0.4pp
364
8.3%
+0.4pp
55 to 59
2021 count
313
% of total
7.1%
Change from 2016
+0.5pp
313
7.1%
+0.5pp
60 to 64
2021 count
269
% of total
6.1%
Change from 2016
-0.4pp
269
6.1%
-0.4pp
65 to 69
2021 count
258
% of total
5.9%
Change from 2016
-0.3pp
258
5.9%
-0.3pp
70 to 74
2021 count
300
% of total
6.8%
Change from 2016
+1.6pp
300
6.8%
+1.6pp
75 to 79
2021 count
209
% of total
4.8%
Change from 2016
+1.8pp
209
4.8%
+1.8pp
80 to 84
2021 count
109
% of total
2.5%
Change from 2016
+0.4pp
109
2.5%
+0.4pp
85 and over
2021 count
85
% of total
1.9%
Change from 2016
+0.2pp
85
1.9%
+0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-6
-0.3pp
5 to 9
-56
-1.5pp
10 to 14
-27
-0.9pp
15 to 19
+4
-0.2pp
20 to 24
-14
-0.6pp
25 to 29
+18
+0.3pp
30 to 34
-9
-0.3pp
35 to 39
+4
-0.1pp
40 to 44
+19
+0.2pp
45 to 49
-16
-0.7pp
50 to 54
+31
+0.4pp
55 to 59
+32
+0.5pp
60 to 64
-5
-0.4pp
65 to 69
-3
-0.3pp
70 to 74
+80
+1.6pp
75 to 79
+80
+1.8pp
80 to 84
+18
+0.4pp
85 and over
+11
+0.2pp
Data table
Five year age groups for Dalkeith. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Nedlands (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Nedlands (C)% | Count | % | Nedlands (C)% | Count | pp | |
| 0 to 4 | 151 | 3.4% | 4.5% | 157 | 3.7% | 4.8% | -6 | -0.3pp |
| 5 to 9 | 281 | 6.4% | 6.7% | 337 | 7.9% | 7.2% | -56 | -1.5pp |
| 10 to 14 | 390 | 8.9% | 7.8% | 417 | 9.8% | 7.9% | -27 | -0.9pp |
| 15 to 19 | 382 | 8.7% | 7.5% | 378 | 8.9% | 7.2% | +4 | -0.2pp |
| 20 to 24 | 273 | 6.2% | 6.3% | 287 | 6.8% | 7.3% | -14 | -0.6pp |
| 25 to 29 | 149 | 3.4% | 4.5% | 131 | 3.1% | 4.4% | +18 | +0.3pp |
| 30 to 34 | 109 | 2.5% | 4.0% | 118 | 2.8% | 4.0% | -9 | -0.3pp |
| 35 to 39 | 173 | 3.9% | 5.0% | 169 | 4.0% | 5.1% | +4 | -0.1pp |
| 40 to 44 | 284 | 6.5% | 6.0% | 265 | 6.3% | 6.4% | +19 | +0.2pp |
| 45 to 49 | 309 | 7.0% | 6.9% | 325 | 7.7% | 7.5% | -16 | -0.7pp |
| 50 to 54 | 364 | 8.3% | 7.3% | 333 | 7.9% | 7.1% | +31 | +0.4pp |
| 55 to 59 | 313 | 7.1% | 6.2% | 281 | 6.6% | 7.0% | +32 | +0.5pp |
| 60 to 64 | 269 | 6.1% | 6.3% | 274 | 6.5% | 6.1% | -5 | -0.4pp |
| 65 to 69 | 258 | 5.9% | 5.6% | 261 | 6.2% | 6.0% | -3 | -0.3pp |
| 70 to 74 | 300 | 6.8% | 5.7% | 220 | 5.2% | 4.3% | +80 | +1.6pp |
| 75 to 79 | 209 | 4.8% | 4.2% | 129 | 3.0% | 3.0% | +80 | +1.8pp |
| 80 to 84 | 109 | 2.5% | 2.6% | 91 | 2.1% | 2.2% | +18 | +0.4pp |
| 85 and over | 85 | 1.9% | 3.0% | 74 | 1.7% | 2.7% | +11 | +0.2pp |
| Total | 4,398 | 100.0% | 100.0% | 4,240 | 100.0% | 100.0% | +158 | 0.0pp |