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 Dean Park, accounting for 8.3% (264 people). This share was higher than Blacktown (C) (7%). Since 2016, the biggest change was in 15 to 19 year olds, which decreased by 58 people and 1.7 percentage points.
Section overview
Age structure - Five year age groups
Dean Park - Total persons (Usual residence)
This table summarises five year age groups for Dean Park 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 Dean Park, with comparison markers for Blacktown (C).
0 to 4
2021 count
225
% of total
7.1%
Change from 2016
-1.0pp
225
7.1%
-1.0pp
5 to 9
2021 count
218
% of total
6.9%
Change from 2016
-0.6pp
218
6.9%
-0.6pp
10 to 14
2021 count
209
% of total
6.6%
Change from 2016
-0.4pp
209
6.6%
-0.4pp
15 to 19
2021 count
178
% of total
5.6%
Change from 2016
-1.7pp
178
5.6%
-1.7pp
20 to 24
2021 count
204
% of total
6.4%
Change from 2016
-0.5pp
204
6.4%
-0.5pp
25 to 29
2021 count
264
% of total
8.3%
Change from 2016
+1.0pp
264
8.3%
+1.0pp
30 to 34
2021 count
248
% of total
7.8%
Change from 2016
+0.9pp
248
7.8%
+0.9pp
35 to 39
2021 count
225
% of total
7.1%
Change from 2016
-0.7pp
225
7.1%
-0.7pp
40 to 44
2021 count
231
% of total
7.3%
Change from 2016
+0.6pp
231
7.3%
+0.6pp
45 to 49
2021 count
168
% of total
5.3%
Change from 2016
-0.7pp
168
5.3%
-0.7pp
50 to 54
2021 count
172
% of total
5.4%
Change from 2016
-1.6pp
172
5.4%
-1.6pp
55 to 59
2021 count
222
% of total
7.0%
Change from 2016
+1.5pp
222
7.0%
+1.5pp
60 to 64
2021 count
163
% of total
5.1%
Change from 2016
+0.5pp
163
5.1%
+0.5pp
65 to 69
2021 count
161
% of total
5.1%
Change from 2016
+1.7pp
161
5.1%
+1.7pp
70 to 74
2021 count
109
% of total
3.4%
Change from 2016
+1.1pp
109
3.4%
+1.1pp
75 to 79
2021 count
65
% of total
2.0%
Change from 2016
+0.6pp
65
2.0%
+0.6pp
80 to 84
2021 count
42
% of total
1.3%
Change from 2016
-0.1pp
42
1.3%
-0.1pp
85 and over
2021 count
89
% of total
2.8%
Change from 2016
+0.2pp
89
2.8%
+0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-36
-1.0pp
5 to 9
-23
-0.6pp
10 to 14
-17
-0.4pp
15 to 19
-58
-1.7pp
20 to 24
-19
-0.5pp
25 to 29
+29
+1.0pp
30 to 34
+26
+0.9pp
35 to 39
-27
-0.7pp
40 to 44
+16
+0.6pp
45 to 49
-27
-0.7pp
50 to 54
-53
-1.6pp
55 to 59
+44
+1.5pp
60 to 64
+15
+0.5pp
65 to 69
+51
+1.7pp
70 to 74
+36
+1.1pp
75 to 79
+19
+0.6pp
80 to 84
-4
-0.1pp
85 and over
+5
+0.2pp
Data table
Five year age groups for Dean Park. 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 | 225 | 7.1% | 7.5% | 261 | 8.1% | 8.0% | -36 | -1.0pp |
| 5 to 9 | 218 | 6.9% | 7.9% | 241 | 7.5% | 7.9% | -23 | -0.6pp |
| 10 to 14 | 209 | 6.6% | 7.3% | 226 | 7.0% | 6.9% | -17 | -0.4pp |
| 15 to 19 | 178 | 5.6% | 6.1% | 236 | 7.3% | 6.9% | -58 | -1.7pp |
| 20 to 24 | 204 | 6.4% | 6.7% | 223 | 6.9% | 6.8% | -19 | -0.5pp |
| 25 to 29 | 264 | 8.3% | 7.0% | 235 | 7.3% | 7.2% | +29 | +1.0pp |
| 30 to 34 | 248 | 7.8% | 7.9% | 222 | 6.9% | 8.3% | +26 | +0.9pp |
| 35 to 39 | 225 | 7.1% | 9.2% | 252 | 7.8% | 8.1% | -27 | -0.7pp |
| 40 to 44 | 231 | 7.3% | 7.8% | 215 | 6.7% | 7.2% | +16 | +0.6pp |
| 45 to 49 | 168 | 5.3% | 6.4% | 195 | 6.0% | 6.5% | -27 | -0.7pp |
| 50 to 54 | 172 | 5.4% | 5.6% | 225 | 7.0% | 6.0% | -53 | -1.6pp |
| 55 to 59 | 222 | 7.0% | 5.1% | 178 | 5.5% | 5.4% | +44 | +1.5pp |
| 60 to 64 | 163 | 5.1% | 4.5% | 148 | 4.6% | 4.6% | +15 | +0.5pp |
| 65 to 69 | 161 | 5.1% | 3.7% | 110 | 3.4% | 3.8% | +51 | +1.7pp |
| 70 to 74 | 109 | 3.4% | 3.1% | 73 | 2.3% | 2.5% | +36 | +1.1pp |
| 75 to 79 | 65 | 2.0% | 1.9% | 46 | 1.4% | 1.7% | +19 | +0.6pp |
| 80 to 84 | 42 | 1.3% | 1.2% | 46 | 1.4% | 1.1% | -4 | -0.1pp |
| 85 and over | 89 | 2.8% | 1.1% | 84 | 2.6% | 1.1% | +5 | +0.2pp |
| Total | 3,180 | 100.0% | 100.0% | 3,227 | 100.0% | 100.0% | -47 | 0.0pp |