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, 35 to 39 year olds was the largest age group among residents in Acacia Gardens, accounting for 9% (331 people). This share was similar to Blacktown (C) (9.2%). Since 2016, the biggest change was in 35 to 39 year olds, which decreased by 67 people and 1.5 percentage points.
Section overview
Age structure - Five year age groups
Acacia Gardens - Total persons (Usual residence)
This table summarises five year age groups for Acacia Gardens 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 Acacia Gardens, with comparison markers for Blacktown (C).
0 to 4
2021 count
255
% of total
7.0%
Change from 2016
-0.9pp
255
7.0%
-0.9pp
5 to 9
2021 count
284
% of total
7.7%
Change from 2016
-0.9pp
284
7.7%
-0.9pp
10 to 14
2021 count
284
% of total
7.7%
Change from 2016
+0.7pp
284
7.7%
+0.7pp
15 to 19
2021 count
238
% of total
6.5%
Change from 2016
+0.4pp
238
6.5%
+0.4pp
20 to 24
2021 count
227
% of total
6.2%
Change from 2016
-0.6pp
227
6.2%
-0.6pp
25 to 29
2021 count
198
% of total
5.4%
Change from 2016
-0.8pp
198
5.4%
-0.8pp
30 to 34
2021 count
286
% of total
7.8%
Change from 2016
-1.0pp
286
7.8%
-1.0pp
35 to 39
2021 count
331
% of total
9.0%
Change from 2016
-1.5pp
331
9.0%
-1.5pp
40 to 44
2021 count
317
% of total
8.6%
Change from 2016
+0.4pp
317
8.6%
+0.4pp
45 to 49
2021 count
285
% of total
7.8%
Change from 2016
+1.1pp
285
7.8%
+1.1pp
50 to 54
2021 count
235
% of total
6.4%
Change from 2016
-0.5pp
235
6.4%
-0.5pp
55 to 59
2021 count
232
% of total
6.3%
Change from 2016
0.0pp
232
6.3%
0.0pp
60 to 64
2021 count
188
% of total
5.1%
Change from 2016
+1.4pp
188
5.1%
+1.4pp
65 to 69
2021 count
119
% of total
3.2%
Change from 2016
-0.5pp
119
3.2%
-0.5pp
70 to 74
2021 count
98
% of total
2.7%
Change from 2016
+1.5pp
98
2.7%
+1.5pp
75 to 79
2021 count
48
% of total
1.3%
Change from 2016
+0.4pp
48
1.3%
+0.4pp
80 to 84
2021 count
32
% of total
0.9%
Change from 2016
+0.5pp
32
0.9%
+0.5pp
85 and over
2021 count
15
% of total
0.4%
Change from 2016
0.0pp
15
0.4%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-44
-0.9pp
5 to 9
-41
-0.9pp
10 to 14
+20
+0.7pp
15 to 19
+6
+0.4pp
20 to 24
-30
-0.6pp
25 to 29
-39
-0.8pp
30 to 34
-50
-1.0pp
35 to 39
-67
-1.5pp
40 to 44
+7
+0.4pp
45 to 49
+29
+1.1pp
50 to 54
-28
-0.5pp
55 to 59
-7
0.0pp
60 to 64
+48
+1.4pp
65 to 69
-23
-0.5pp
70 to 74
+51
+1.5pp
75 to 79
+13
+0.4pp
80 to 84
+18
+0.5pp
85 and over
+1
0.0pp
Data table
Five year age groups for Acacia Gardens. 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 | 255 | 7.0% | 7.5% | 299 | 7.9% | 8.0% | -44 | -0.9pp |
| 5 to 9 | 284 | 7.7% | 7.9% | 325 | 8.6% | 7.9% | -41 | -0.9pp |
| 10 to 14 | 284 | 7.7% | 7.3% | 264 | 7.0% | 6.9% | +20 | +0.7pp |
| 15 to 19 | 238 | 6.5% | 6.1% | 232 | 6.1% | 6.9% | +6 | +0.4pp |
| 20 to 24 | 227 | 6.2% | 6.7% | 257 | 6.8% | 6.8% | -30 | -0.6pp |
| 25 to 29 | 198 | 5.4% | 7.0% | 237 | 6.2% | 7.2% | -39 | -0.8pp |
| 30 to 34 | 286 | 7.8% | 7.9% | 336 | 8.8% | 8.3% | -50 | -1.0pp |
| 35 to 39 | 331 | 9.0% | 9.2% | 398 | 10.5% | 8.1% | -67 | -1.5pp |
| 40 to 44 | 317 | 8.6% | 7.8% | 310 | 8.2% | 7.2% | +7 | +0.4pp |
| 45 to 49 | 285 | 7.8% | 6.4% | 256 | 6.7% | 6.5% | +29 | +1.1pp |
| 50 to 54 | 235 | 6.4% | 5.6% | 263 | 6.9% | 6.0% | -28 | -0.5pp |
| 55 to 59 | 232 | 6.3% | 5.1% | 239 | 6.3% | 5.4% | -7 | 0.0pp |
| 60 to 64 | 188 | 5.1% | 4.5% | 140 | 3.7% | 4.6% | +48 | +1.4pp |
| 65 to 69 | 119 | 3.2% | 3.7% | 142 | 3.7% | 3.8% | -23 | -0.5pp |
| 70 to 74 | 98 | 2.7% | 3.1% | 47 | 1.2% | 2.5% | +51 | +1.5pp |
| 75 to 79 | 48 | 1.3% | 1.9% | 35 | 0.9% | 1.7% | +13 | +0.4pp |
| 80 to 84 | 32 | 0.9% | 1.2% | 14 | 0.4% | 1.1% | +18 | +0.5pp |
| 85 and over | 15 | 0.4% | 1.1% | 14 | 0.4% | 1.1% | +1 | 0.0pp |
| Total | 3,668 | 100.0% | 100.0% | 3,798 | 100.0% | 100.0% | -130 | 0.0pp |