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, 30 to 34 year olds was the largest age group among residents in Rosehill (NSW), accounting for 15.3% (618 people). This share was higher than Parramatta (C) (10.3%). Since 2016, the biggest change was in 35 to 39 year olds, which increased by 158 people and 3.2 percentage points.
Section overview
Age structure - Five year age groups
Rosehill (NSW) - Total persons (Usual residence)
This table summarises five year age groups for Rosehill (NSW) in 2021 for persons, with comparison against Parramatta (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Rosehill (NSW), with comparison markers for Parramatta (C).
0 to 4
2021 count
329
% of total
8.1%
Change from 2016
-0.1pp
329
8.1%
-0.1pp
5 to 9
2021 count
289
% of total
7.1%
Change from 2016
+1.9pp
289
7.1%
+1.9pp
10 to 14
2021 count
151
% of total
3.7%
Change from 2016
+0.2pp
151
3.7%
+0.2pp
15 to 19
2021 count
114
% of total
2.8%
Change from 2016
-0.6pp
114
2.8%
-0.6pp
20 to 24
2021 count
272
% of total
6.7%
Change from 2016
-1.9pp
272
6.7%
-1.9pp
25 to 29
2021 count
545
% of total
13.5%
Change from 2016
-2.2pp
545
13.5%
-2.2pp
30 to 34
2021 count
618
% of total
15.3%
Change from 2016
-3.4pp
618
15.3%
-3.4pp
35 to 39
2021 count
584
% of total
14.4%
Change from 2016
+3.2pp
584
14.4%
+3.2pp
40 to 44
2021 count
287
% of total
7.1%
Change from 2016
+0.9pp
287
7.1%
+0.9pp
45 to 49
2021 count
185
% of total
4.6%
Change from 2016
0.0pp
185
4.6%
0.0pp
50 to 54
2021 count
155
% of total
3.8%
Change from 2016
+0.3pp
155
3.8%
+0.3pp
55 to 59
2021 count
145
% of total
3.6%
Change from 2016
+0.6pp
145
3.6%
+0.6pp
60 to 64
2021 count
122
% of total
3.0%
Change from 2016
+0.3pp
122
3.0%
+0.3pp
65 to 69
2021 count
88
% of total
2.2%
Change from 2016
0.0pp
88
2.2%
0.0pp
70 to 74
2021 count
81
% of total
2.0%
Change from 2016
+1.3pp
81
2.0%
+1.3pp
75 to 79
2021 count
38
% of total
0.9%
Change from 2016
+0.3pp
38
0.9%
+0.3pp
80 to 84
2021 count
16
% of total
0.4%
Change from 2016
0.0pp
16
0.4%
0.0pp
85 and over
2021 count
20
% of total
0.5%
Change from 2016
0.0pp
20
0.5%
0.0pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+18
-0.1pp
5 to 9
+91
+1.9pp
10 to 14
+18
+0.2pp
15 to 19
-14
-0.6pp
20 to 24
-56
-1.9pp
25 to 29
-53
-2.2pp
30 to 34
-94
-3.4pp
35 to 39
+158
+3.2pp
40 to 44
+51
+0.9pp
45 to 49
+10
0.0pp
50 to 54
+22
+0.3pp
55 to 59
+32
+0.6pp
60 to 64
+19
+0.3pp
65 to 69
+3
0.0pp
70 to 74
+53
+1.3pp
75 to 79
+16
+0.3pp
80 to 84
0
0.0pp
85 and over
+2
0.0pp
Data table
Five year age groups for Rosehill (NSW). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Parramatta (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Parramatta (C)% | Count | % | Parramatta (C)% | Count | pp | |
| 0 to 4 | 329 | 8.1% | 6.2% | 311 | 8.2% | 7.3% | +18 | -0.1pp |
| 5 to 9 | 289 | 7.1% | 6.5% | 198 | 5.2% | 6.2% | +91 | +1.9pp |
| 10 to 14 | 151 | 3.7% | 5.4% | 133 | 3.5% | 4.9% | +18 | +0.2pp |
| 15 to 19 | 114 | 2.8% | 4.5% | 128 | 3.4% | 5.1% | -14 | -0.6pp |
| 20 to 24 | 272 | 6.7% | 6.6% | 328 | 8.6% | 6.6% | -56 | -1.9pp |
| 25 to 29 | 545 | 13.5% | 9.1% | 598 | 15.7% | 9.2% | -53 | -2.2pp |
| 30 to 34 | 618 | 15.3% | 10.3% | 712 | 18.7% | 11.1% | -94 | -3.4pp |
| 35 to 39 | 584 | 14.4% | 10.2% | 426 | 11.2% | 8.8% | +158 | +3.2pp |
| 40 to 44 | 287 | 7.1% | 7.5% | 236 | 6.2% | 7.0% | +51 | +0.9pp |
| 45 to 49 | 185 | 4.6% | 6.1% | 175 | 4.6% | 6.0% | +10 | 0.0pp |
| 50 to 54 | 155 | 3.8% | 5.3% | 133 | 3.5% | 5.8% | +22 | +0.3pp |
| 55 to 59 | 145 | 3.6% | 5.0% | 113 | 3.0% | 5.3% | +32 | +0.6pp |
| 60 to 64 | 122 | 3.0% | 4.6% | 103 | 2.7% | 4.6% | +19 | +0.3pp |
| 65 to 69 | 88 | 2.2% | 3.9% | 85 | 2.2% | 3.8% | +3 | 0.0pp |
| 70 to 74 | 81 | 2.0% | 3.1% | 28 | 0.7% | 2.9% | +53 | +1.3pp |
| 75 to 79 | 38 | 0.9% | 2.3% | 22 | 0.6% | 2.2% | +16 | +0.3pp |
| 80 to 84 | 16 | 0.4% | 1.6% | 16 | 0.4% | 1.6% | 0 | 0.0pp |
| 85 and over | 20 | 0.5% | 1.6% | 18 | 0.5% | 1.7% | +2 | 0.0pp |
| Total | 4,047 | 100.0% | 100.0% | 3,806 | 100.0% | 100.0% | +241 | 0.0pp |