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 Dharruk, accounting for 8.1% (227 people). This share was higher than Blacktown (C) (7.3%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 84 people and 3 percentage points.
Section overview
Age structure - Five year age groups
Dharruk - Total persons (Usual residence)
This table summarises five year age groups for Dharruk in 2021 for persons, with comparison against Blacktown (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Dharruk, with comparison markers for Blacktown (C).
0 to 4
2021 count
210
% of total
7.5%
Change from 2016
+0.1pp
210
7.5%
+0.1pp
5 to 9
2021 count
218
% of total
7.8%
Change from 2016
+0.2pp
218
7.8%
+0.2pp
10 to 14
2021 count
227
% of total
8.1%
Change from 2016
+0.1pp
227
8.1%
+0.1pp
15 to 19
2021 count
195
% of total
6.9%
Change from 2016
-0.5pp
195
6.9%
-0.5pp
20 to 24
2021 count
164
% of total
5.8%
Change from 2016
-0.5pp
164
5.8%
-0.5pp
25 to 29
2021 count
182
% of total
6.5%
Change from 2016
-0.9pp
182
6.5%
-0.9pp
30 to 34
2021 count
201
% of total
7.2%
Change from 2016
+0.6pp
201
7.2%
+0.6pp
35 to 39
2021 count
193
% of total
6.9%
Change from 2016
+0.5pp
193
6.9%
+0.5pp
40 to 44
2021 count
150
% of total
5.3%
Change from 2016
-0.6pp
150
5.3%
-0.6pp
45 to 49
2021 count
162
% of total
5.8%
Change from 2016
-0.5pp
162
5.8%
-0.5pp
50 to 54
2021 count
178
% of total
6.3%
Change from 2016
-0.4pp
178
6.3%
-0.4pp
55 to 59
2021 count
167
% of total
6.0%
Change from 2016
+0.2pp
167
6.0%
+0.2pp
60 to 64
2021 count
142
% of total
5.1%
Change from 2016
-0.4pp
142
5.1%
-0.4pp
65 to 69
2021 count
155
% of total
5.5%
Change from 2016
-1.1pp
155
5.5%
-1.1pp
70 to 74
2021 count
173
% of total
6.2%
Change from 2016
+3.0pp
173
6.2%
+3.0pp
75 to 79
2021 count
59
% of total
2.1%
Change from 2016
+0.8pp
59
2.1%
+0.8pp
80 to 84
2021 count
40
% of total
1.4%
Change from 2016
+0.3pp
40
1.4%
+0.3pp
85 and over
2021 count
19
% of total
0.7%
Change from 2016
+0.1pp
19
0.7%
+0.1pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+5
+0.1pp
5 to 9
+6
+0.2pp
10 to 14
+6
+0.1pp
15 to 19
-9
-0.5pp
20 to 24
-12
-0.5pp
25 to 29
-22
-0.9pp
30 to 34
+18
+0.6pp
35 to 39
+15
+0.5pp
40 to 44
-13
-0.6pp
45 to 49
-14
-0.5pp
50 to 54
-9
-0.4pp
55 to 59
+7
+0.2pp
60 to 64
-11
-0.4pp
65 to 69
-28
-1.1pp
70 to 74
+84
+3.0pp
75 to 79
+24
+0.8pp
80 to 84
+10
+0.3pp
85 and over
+2
+0.1pp
Data table
Five year age groups for Dharruk. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Blacktown (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Blacktown (C)% | Count | % | Blacktown (C)% | Count | pp | |
| 0 to 4 | 210 | 7.5% | 7.5% | 205 | 7.4% | 8.0% | +5 | +0.1pp |
| 5 to 9 | 218 | 7.8% | 7.9% | 212 | 7.6% | 7.9% | +6 | +0.2pp |
| 10 to 14 | 227 | 8.1% | 7.3% | 221 | 8.0% | 6.9% | +6 | +0.1pp |
| 15 to 19 | 195 | 6.9% | 6.1% | 204 | 7.4% | 6.9% | -9 | -0.5pp |
| 20 to 24 | 164 | 5.8% | 6.7% | 176 | 6.3% | 6.8% | -12 | -0.5pp |
| 25 to 29 | 182 | 6.5% | 7.0% | 204 | 7.4% | 7.2% | -22 | -0.9pp |
| 30 to 34 | 201 | 7.2% | 7.9% | 183 | 6.6% | 8.3% | +18 | +0.6pp |
| 35 to 39 | 193 | 6.9% | 9.2% | 178 | 6.4% | 8.1% | +15 | +0.5pp |
| 40 to 44 | 150 | 5.3% | 7.8% | 163 | 5.9% | 7.2% | -13 | -0.6pp |
| 45 to 49 | 162 | 5.8% | 6.4% | 176 | 6.3% | 6.5% | -14 | -0.5pp |
| 50 to 54 | 178 | 6.3% | 5.6% | 187 | 6.7% | 6.0% | -9 | -0.4pp |
| 55 to 59 | 167 | 6.0% | 5.1% | 160 | 5.8% | 5.4% | +7 | +0.2pp |
| 60 to 64 | 142 | 5.1% | 4.5% | 153 | 5.5% | 4.6% | -11 | -0.4pp |
| 65 to 69 | 155 | 5.5% | 3.7% | 183 | 6.6% | 3.8% | -28 | -1.1pp |
| 70 to 74 | 173 | 6.2% | 3.1% | 89 | 3.2% | 2.5% | +84 | +3.0pp |
| 75 to 79 | 59 | 2.1% | 1.9% | 35 | 1.3% | 1.7% | +24 | +0.8pp |
| 80 to 84 | 40 | 1.4% | 1.2% | 30 | 1.1% | 1.1% | +10 | +0.3pp |
| 85 and over | 19 | 0.7% | 1.1% | 17 | 0.6% | 1.1% | +2 | +0.1pp |
| Total | 2,806 | 100.0% | 100.0% | 2,774 | 100.0% | 100.0% | +32 | 0.0pp |