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 Parklea, accounting for 11.3% (417 people). This share was higher than Blacktown (C) (9.2%). Since 2016, the biggest change was in 25 to 29 year olds, which increased by 46 people and 0.7 percentage points.
Section overview
Age structure - Five year age groups
Parklea - Total persons (Usual residence)
This table summarises five year age groups for Parklea 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 Parklea, with comparison markers for Blacktown (C).
0 to 4
2021 count
154
% of total
4.2%
Change from 2016
-1.3pp
154
4.2%
-1.3pp
5 to 9
2021 count
170
% of total
4.6%
Change from 2016
-1.6pp
170
4.6%
-1.6pp
10 to 14
2021 count
200
% of total
5.4%
Change from 2016
+0.1pp
200
5.4%
+0.1pp
15 to 19
2021 count
202
% of total
5.5%
Change from 2016
-0.2pp
202
5.5%
-0.2pp
20 to 24
2021 count
309
% of total
8.4%
Change from 2016
-0.5pp
309
8.4%
-0.5pp
25 to 29
2021 count
376
% of total
10.2%
Change from 2016
+0.7pp
376
10.2%
+0.7pp
30 to 34
2021 count
389
% of total
10.6%
Change from 2016
-1.2pp
389
10.6%
-1.2pp
35 to 39
2021 count
417
% of total
11.3%
Change from 2016
-0.2pp
417
11.3%
-0.2pp
40 to 44
2021 count
377
% of total
10.2%
Change from 2016
+0.1pp
377
10.2%
+0.1pp
45 to 49
2021 count
308
% of total
8.4%
Change from 2016
+0.2pp
308
8.4%
+0.2pp
50 to 54
2021 count
218
% of total
5.9%
Change from 2016
-0.1pp
218
5.9%
-0.1pp
55 to 59
2021 count
192
% of total
5.2%
Change from 2016
+0.4pp
192
5.2%
+0.4pp
60 to 64
2021 count
131
% of total
3.6%
Change from 2016
+0.7pp
131
3.6%
+0.7pp
65 to 69
2021 count
100
% of total
2.7%
Change from 2016
+0.6pp
100
2.7%
+0.6pp
70 to 74
2021 count
61
% of total
1.7%
Change from 2016
+0.8pp
61
1.7%
+0.8pp
75 to 79
2021 count
30
% of total
0.8%
Change from 2016
+0.1pp
30
0.8%
+0.1pp
80 to 84
2021 count
24
% of total
0.7%
Change from 2016
+0.4pp
24
0.7%
+0.4pp
85 and over
2021 count
4
% of total
0.1%
Change from 2016
0.0pp
4
0.1%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-35
-1.3pp
5 to 9
-45
-1.6pp
10 to 14
+15
+0.1pp
15 to 19
+4
-0.2pp
20 to 24
+1
-0.5pp
25 to 29
+46
+0.7pp
30 to 34
-19
-1.2pp
35 to 39
+18
-0.2pp
40 to 44
+26
+0.1pp
45 to 49
+25
+0.2pp
50 to 54
+9
-0.1pp
55 to 59
+24
+0.4pp
60 to 64
+30
+0.7pp
65 to 69
+28
+0.6pp
70 to 74
+31
+0.8pp
75 to 79
+7
+0.1pp
80 to 84
+14
+0.4pp
85 and over
+1
0.0pp
Data table
Five year age groups for Parklea. 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 | 154 | 4.2% | 7.5% | 189 | 5.5% | 8.0% | -35 | -1.3pp |
| 5 to 9 | 170 | 4.6% | 7.9% | 215 | 6.2% | 7.9% | -45 | -1.6pp |
| 10 to 14 | 200 | 5.4% | 7.3% | 185 | 5.3% | 6.9% | +15 | +0.1pp |
| 15 to 19 | 202 | 5.5% | 6.1% | 198 | 5.7% | 6.9% | +4 | -0.2pp |
| 20 to 24 | 309 | 8.4% | 6.7% | 308 | 8.9% | 6.8% | +1 | -0.5pp |
| 25 to 29 | 376 | 10.2% | 7.0% | 330 | 9.5% | 7.2% | +46 | +0.7pp |
| 30 to 34 | 389 | 10.6% | 7.9% | 408 | 11.8% | 8.3% | -19 | -1.2pp |
| 35 to 39 | 417 | 11.3% | 9.2% | 399 | 11.5% | 8.1% | +18 | -0.2pp |
| 40 to 44 | 377 | 10.2% | 7.8% | 351 | 10.1% | 7.2% | +26 | +0.1pp |
| 45 to 49 | 308 | 8.4% | 6.4% | 283 | 8.2% | 6.5% | +25 | +0.2pp |
| 50 to 54 | 218 | 5.9% | 5.6% | 209 | 6.0% | 6.0% | +9 | -0.1pp |
| 55 to 59 | 192 | 5.2% | 5.1% | 168 | 4.8% | 5.4% | +24 | +0.4pp |
| 60 to 64 | 131 | 3.6% | 4.5% | 101 | 2.9% | 4.6% | +30 | +0.7pp |
| 65 to 69 | 100 | 2.7% | 3.7% | 72 | 2.1% | 3.8% | +28 | +0.6pp |
| 70 to 74 | 61 | 1.7% | 3.1% | 30 | 0.9% | 2.5% | +31 | +0.8pp |
| 75 to 79 | 30 | 0.8% | 1.9% | 23 | 0.7% | 1.7% | +7 | +0.1pp |
| 80 to 84 | 24 | 0.7% | 1.2% | 10 | 0.3% | 1.1% | +14 | +0.4pp |
| 85 and over | 4 | 0.1% | 1.1% | 3 | 0.1% | 1.1% | +1 | 0.0pp |
| Total | 3,684 | 100.0% | 100.0% | 3,465 | 100.0% | 100.0% | +219 | 0.0pp |