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 Westmead (part), accounting for 14% (2,323 people). This share was higher than Cumberland (A) (8.5%). Since 2016, the biggest change was in 30 to 34 year olds, which decreased by 646 people and 4.2 percentage points.
Section overview
Age structure - Five year age groups
Westmead (part) - Total persons (Usual residence)
This table summarises five year age groups for Westmead (part) in 2021 for persons, with comparison against Cumberland (A) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Westmead (part), with comparison markers for Cumberland (A).
0 to 4
2021 count
1,328
% of total
8.0%
Change from 2016
-1.9pp
1,328
8.0%
-1.9pp
5 to 9
2021 count
1,234
% of total
7.5%
Change from 2016
-0.5pp
1,234
7.5%
-0.5pp
10 to 14
2021 count
911
% of total
5.5%
Change from 2016
+1.2pp
911
5.5%
+1.2pp
15 to 19
2021 count
528
% of total
3.2%
Change from 2016
+0.2pp
528
3.2%
+0.2pp
20 to 24
2021 count
1,048
% of total
6.3%
Change from 2016
+1.8pp
1,048
6.3%
+1.8pp
25 to 29
2021 count
1,804
% of total
10.9%
Change from 2016
+0.9pp
1,804
10.9%
+0.9pp
30 to 34
2021 count
2,073
% of total
12.5%
Change from 2016
-4.2pp
2,073
12.5%
-4.2pp
35 to 39
2021 count
2,323
% of total
14.0%
Change from 2016
+1.1pp
2,323
14.0%
+1.1pp
40 to 44
2021 count
1,453
% of total
8.8%
Change from 2016
+1.6pp
1,453
8.8%
+1.6pp
45 to 49
2021 count
772
% of total
4.7%
Change from 2016
+0.4pp
772
4.7%
+0.4pp
50 to 54
2021 count
606
% of total
3.7%
Change from 2016
-0.1pp
606
3.7%
-0.1pp
55 to 59
2021 count
546
% of total
3.3%
Change from 2016
-0.2pp
546
3.3%
-0.2pp
60 to 64
2021 count
491
% of total
3.0%
Change from 2016
+0.1pp
491
3.0%
+0.1pp
65 to 69
2021 count
397
% of total
2.4%
Change from 2016
0.0pp
397
2.4%
0.0pp
70 to 74
2021 count
359
% of total
2.2%
Change from 2016
+0.4pp
359
2.2%
+0.4pp
75 to 79
2021 count
246
% of total
1.5%
Change from 2016
+0.1pp
246
1.5%
+0.1pp
80 to 84
2021 count
209
% of total
1.3%
Change from 2016
-0.1pp
209
1.3%
-0.1pp
85 and over
2021 count
224
% of total
1.4%
Change from 2016
-0.5pp
224
1.4%
-0.5pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-289
-1.9pp
5 to 9
-68
-0.5pp
10 to 14
+203
+1.2pp
15 to 19
+43
+0.2pp
20 to 24
+317
+1.8pp
25 to 29
+167
+0.9pp
30 to 34
-646
-4.2pp
35 to 39
+218
+1.1pp
40 to 44
+283
+1.6pp
45 to 49
+65
+0.4pp
50 to 54
-8
-0.1pp
55 to 59
-22
-0.2pp
60 to 64
+17
+0.1pp
65 to 69
+11
0.0pp
70 to 74
+72
+0.4pp
75 to 79
+14
+0.1pp
80 to 84
-18
-0.1pp
85 and over
-88
-0.5pp
Data table
Five year age groups for Westmead (part). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Cumberland (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Cumberland (A)% | Count | % | Cumberland (A)% | Count | pp | |
| 0 to 4 | 1,328 | 8.0% | 7.0% | 1,617 | 9.9% | 7.8% | -289 | -1.9pp |
| 5 to 9 | 1,234 | 7.5% | 6.8% | 1,302 | 8.0% | 7.0% | -68 | -0.5pp |
| 10 to 14 | 911 | 5.5% | 6.1% | 708 | 4.3% | 5.7% | +203 | +1.2pp |
| 15 to 19 | 528 | 3.2% | 5.4% | 485 | 3.0% | 5.8% | +43 | +0.2pp |
| 20 to 24 | 1,048 | 6.3% | 7.9% | 731 | 4.5% | 7.9% | +317 | +1.8pp |
| 25 to 29 | 1,804 | 10.9% | 9.3% | 1,637 | 10.0% | 9.9% | +167 | +0.9pp |
| 30 to 34 | 2,073 | 12.5% | 9.2% | 2,719 | 16.7% | 9.6% | -646 | -4.2pp |
| 35 to 39 | 2,323 | 14.0% | 8.5% | 2,105 | 12.9% | 7.8% | +218 | +1.1pp |
| 40 to 44 | 1,453 | 8.8% | 6.8% | 1,170 | 7.2% | 6.3% | +283 | +1.6pp |
| 45 to 49 | 772 | 4.7% | 5.6% | 707 | 4.3% | 5.8% | +65 | +0.4pp |
| 50 to 54 | 606 | 3.7% | 5.4% | 614 | 3.8% | 5.6% | -8 | -0.1pp |
| 55 to 59 | 546 | 3.3% | 5.2% | 568 | 3.5% | 5.2% | -22 | -0.2pp |
| 60 to 64 | 491 | 3.0% | 4.6% | 474 | 2.9% | 4.3% | +17 | +0.1pp |
| 65 to 69 | 397 | 2.4% | 3.8% | 386 | 2.4% | 3.6% | +11 | 0.0pp |
| 70 to 74 | 359 | 2.2% | 3.1% | 287 | 1.8% | 2.6% | +72 | +0.4pp |
| 75 to 79 | 246 | 1.5% | 2.2% | 232 | 1.4% | 2.0% | +14 | +0.1pp |
| 80 to 84 | 209 | 1.3% | 1.5% | 227 | 1.4% | 1.4% | -18 | -0.1pp |
| 85 and over | 224 | 1.4% | 1.5% | 312 | 1.9% | 1.5% | -88 | -0.5pp |
| Total | 16,555 | 100.0% | 100.0% | 16,309 | 100.0% | 100.0% | +246 | 0.0pp |