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 Rooty Hill, accounting for 7.4% (1,201 people). This share was lower than Blacktown (C) (9.2%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 297 people and 1.6 percentage points.
Section overview
Age structure - Five year age groups
Rooty Hill - Total persons (Usual residence)
This table summarises five year age groups for Rooty Hill 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 Rooty Hill, with comparison markers for Blacktown (C).
0 to 4
2021 count
1,112
% of total
6.9%
Change from 2016
+0.1pp
1,112
6.9%
+0.1pp
5 to 9
2021 count
1,096
% of total
6.8%
Change from 2016
-0.2pp
1,096
6.8%
-0.2pp
10 to 14
2021 count
1,053
% of total
6.5%
Change from 2016
+0.3pp
1,053
6.5%
+0.3pp
15 to 19
2021 count
949
% of total
5.9%
Change from 2016
-1.5pp
949
5.9%
-1.5pp
20 to 24
2021 count
1,105
% of total
6.8%
Change from 2016
-0.6pp
1,105
6.8%
-0.6pp
25 to 29
2021 count
1,088
% of total
6.7%
Change from 2016
-0.5pp
1,088
6.7%
-0.5pp
30 to 34
2021 count
1,156
% of total
7.1%
Change from 2016
-0.4pp
1,156
7.1%
-0.4pp
35 to 39
2021 count
1,201
% of total
7.4%
Change from 2016
-0.1pp
1,201
7.4%
-0.1pp
40 to 44
2021 count
1,111
% of total
6.9%
Change from 2016
+0.5pp
1,111
6.9%
+0.5pp
45 to 49
2021 count
990
% of total
6.1%
Change from 2016
0.0pp
990
6.1%
0.0pp
50 to 54
2021 count
899
% of total
5.6%
Change from 2016
-0.7pp
899
5.6%
-0.7pp
55 to 59
2021 count
891
% of total
5.5%
Change from 2016
-0.6pp
891
5.5%
-0.6pp
60 to 64
2021 count
873
% of total
5.4%
Change from 2016
+0.2pp
873
5.4%
+0.2pp
65 to 69
2021 count
708
% of total
4.4%
Change from 2016
0.0pp
708
4.4%
0.0pp
70 to 74
2021 count
677
% of total
4.2%
Change from 2016
+1.6pp
677
4.2%
+1.6pp
75 to 79
2021 count
401
% of total
2.5%
Change from 2016
+0.8pp
401
2.5%
+0.8pp
80 to 84
2021 count
296
% of total
1.8%
Change from 2016
+0.2pp
296
1.8%
+0.2pp
85 and over
2021 count
543
% of total
3.4%
Change from 2016
+0.8pp
543
3.4%
+0.8pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+106
+0.1pp
5 to 9
+69
-0.2pp
10 to 14
+143
+0.3pp
15 to 19
-134
-1.5pp
20 to 24
+16
-0.6pp
25 to 29
+34
-0.5pp
30 to 34
+50
-0.4pp
35 to 39
+93
-0.1pp
40 to 44
+164
+0.5pp
45 to 49
+100
0.0pp
50 to 54
-24
-0.7pp
55 to 59
-2
-0.6pp
60 to 64
+103
+0.2pp
65 to 69
+56
0.0pp
70 to 74
+297
+1.6pp
75 to 79
+148
+0.8pp
80 to 84
+63
+0.2pp
85 and over
+164
+0.8pp
Data table
Five year age groups for Rooty Hill. 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 | 1,112 | 6.9% | 7.5% | 1,006 | 6.8% | 8.0% | +106 | +0.1pp |
| 5 to 9 | 1,096 | 6.8% | 7.9% | 1,027 | 7.0% | 7.9% | +69 | -0.2pp |
| 10 to 14 | 1,053 | 6.5% | 7.3% | 910 | 6.2% | 6.9% | +143 | +0.3pp |
| 15 to 19 | 949 | 5.9% | 6.1% | 1,083 | 7.4% | 6.9% | -134 | -1.5pp |
| 20 to 24 | 1,105 | 6.8% | 6.7% | 1,089 | 7.4% | 6.8% | +16 | -0.6pp |
| 25 to 29 | 1,088 | 6.7% | 7.0% | 1,054 | 7.2% | 7.2% | +34 | -0.5pp |
| 30 to 34 | 1,156 | 7.1% | 7.9% | 1,106 | 7.5% | 8.3% | +50 | -0.4pp |
| 35 to 39 | 1,201 | 7.4% | 9.2% | 1,108 | 7.5% | 8.1% | +93 | -0.1pp |
| 40 to 44 | 1,111 | 6.9% | 7.8% | 947 | 6.4% | 7.2% | +164 | +0.5pp |
| 45 to 49 | 990 | 6.1% | 6.4% | 890 | 6.1% | 6.5% | +100 | 0.0pp |
| 50 to 54 | 899 | 5.6% | 5.6% | 923 | 6.3% | 6.0% | -24 | -0.7pp |
| 55 to 59 | 891 | 5.5% | 5.1% | 893 | 6.1% | 5.4% | -2 | -0.6pp |
| 60 to 64 | 873 | 5.4% | 4.5% | 770 | 5.2% | 4.6% | +103 | +0.2pp |
| 65 to 69 | 708 | 4.4% | 3.7% | 652 | 4.4% | 3.8% | +56 | 0.0pp |
| 70 to 74 | 677 | 4.2% | 3.1% | 380 | 2.6% | 2.5% | +297 | +1.6pp |
| 75 to 79 | 401 | 2.5% | 1.9% | 253 | 1.7% | 1.7% | +148 | +0.8pp |
| 80 to 84 | 296 | 1.8% | 1.2% | 233 | 1.6% | 1.1% | +63 | +0.2pp |
| 85 and over | 543 | 3.4% | 1.1% | 379 | 2.6% | 1.1% | +164 | +0.8pp |
| Total | 16,176 | 100.0% | 100.0% | 14,704 | 100.0% | 100.0% | +1,472 | 0.0pp |