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, 45 to 49 year olds was the largest age group among residents in Oatley, accounting for 7.2% (768 people). This share was higher than Georges River (A) (6.3%). Since 2016, the biggest change was in 70 to 74 year olds, which increased by 125 people and 1.1 percentage points.
Section overview
Age structure - Five year age groups
Oatley - Total persons (Usual residence)
This table summarises five year age groups for Oatley in 2021 for persons, with comparison against Georges River (A) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Oatley, with comparison markers for Georges River (A).
0 to 4
2021 count
525
% of total
4.9%
Change from 2016
-0.8pp
525
4.9%
-0.8pp
5 to 9
2021 count
718
% of total
6.7%
Change from 2016
0.0pp
718
6.7%
0.0pp
10 to 14
2021 count
734
% of total
6.9%
Change from 2016
+0.4pp
734
6.9%
+0.4pp
15 to 19
2021 count
672
% of total
6.3%
Change from 2016
0.0pp
672
6.3%
0.0pp
20 to 24
2021 count
589
% of total
5.5%
Change from 2016
-0.6pp
589
5.5%
-0.6pp
25 to 29
2021 count
457
% of total
4.3%
Change from 2016
-0.2pp
457
4.3%
-0.2pp
30 to 34
2021 count
468
% of total
4.4%
Change from 2016
-1.1pp
468
4.4%
-1.1pp
35 to 39
2021 count
730
% of total
6.8%
Change from 2016
+0.9pp
730
6.8%
+0.9pp
40 to 44
2021 count
688
% of total
6.5%
Change from 2016
-0.5pp
688
6.5%
-0.5pp
45 to 49
2021 count
768
% of total
7.2%
Change from 2016
-0.1pp
768
7.2%
-0.1pp
50 to 54
2021 count
716
% of total
6.7%
Change from 2016
-0.1pp
716
6.7%
-0.1pp
55 to 59
2021 count
693
% of total
6.5%
Change from 2016
-0.7pp
693
6.5%
-0.7pp
60 to 64
2021 count
741
% of total
6.9%
Change from 2016
+0.4pp
741
6.9%
+0.4pp
65 to 69
2021 count
642
% of total
6.0%
Change from 2016
+0.7pp
642
6.0%
+0.7pp
70 to 74
2021 count
557
% of total
5.2%
Change from 2016
+1.1pp
557
5.2%
+1.1pp
75 to 79
2021 count
405
% of total
3.8%
Change from 2016
+0.9pp
405
3.8%
+0.9pp
80 to 84
2021 count
249
% of total
2.3%
Change from 2016
+0.2pp
249
2.3%
+0.2pp
85 and over
2021 count
296
% of total
2.8%
Change from 2016
-0.4pp
296
2.8%
-0.4pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-71
-0.8pp
5 to 9
+17
0.0pp
10 to 14
+56
+0.4pp
15 to 19
+8
0.0pp
20 to 24
-50
-0.6pp
25 to 29
-15
-0.2pp
30 to 34
-112
-1.1pp
35 to 39
+108
+0.9pp
40 to 44
-44
-0.5pp
45 to 49
0
-0.1pp
50 to 54
+2
-0.1pp
55 to 59
-65
-0.7pp
60 to 64
+62
+0.4pp
65 to 69
+81
+0.7pp
70 to 74
+125
+1.1pp
75 to 79
+103
+0.9pp
80 to 84
+31
+0.2pp
85 and over
-43
-0.4pp
Data table
Five year age groups for Oatley. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Georges River (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Georges River (A)% | Count | % | Georges River (A)% | Count | pp | |
| 0 to 4 | 525 | 4.9% | 5.0% | 596 | 5.7% | 5.8% | -71 | -0.8pp |
| 5 to 9 | 718 | 6.7% | 5.5% | 701 | 6.7% | 5.6% | +17 | 0.0pp |
| 10 to 14 | 734 | 6.9% | 5.4% | 678 | 6.5% | 5.3% | +56 | +0.4pp |
| 15 to 19 | 672 | 6.3% | 5.3% | 664 | 6.3% | 6.1% | +8 | 0.0pp |
| 20 to 24 | 589 | 5.5% | 7.6% | 639 | 6.1% | 7.6% | -50 | -0.6pp |
| 25 to 29 | 457 | 4.3% | 8.0% | 472 | 4.5% | 8.7% | -15 | -0.2pp |
| 30 to 34 | 468 | 4.4% | 7.5% | 580 | 5.5% | 7.9% | -112 | -1.1pp |
| 35 to 39 | 730 | 6.8% | 7.2% | 622 | 5.9% | 6.6% | +108 | +0.9pp |
| 40 to 44 | 688 | 6.5% | 6.3% | 732 | 7.0% | 6.5% | -44 | -0.5pp |
| 45 to 49 | 768 | 7.2% | 6.3% | 768 | 7.3% | 6.5% | 0 | -0.1pp |
| 50 to 54 | 716 | 6.7% | 6.2% | 714 | 6.8% | 6.6% | +2 | -0.1pp |
| 55 to 59 | 693 | 6.5% | 6.3% | 758 | 7.2% | 6.1% | -65 | -0.7pp |
| 60 to 64 | 741 | 6.9% | 5.9% | 679 | 6.5% | 5.2% | +62 | +0.4pp |
| 65 to 69 | 642 | 6.0% | 4.9% | 561 | 5.3% | 4.5% | +81 | +0.7pp |
| 70 to 74 | 557 | 5.2% | 4.2% | 432 | 4.1% | 3.4% | +125 | +1.1pp |
| 75 to 79 | 405 | 3.8% | 3.1% | 302 | 2.9% | 2.7% | +103 | +0.9pp |
| 80 to 84 | 249 | 2.3% | 2.3% | 218 | 2.1% | 2.2% | +31 | +0.2pp |
| 85 and over | 296 | 2.8% | 2.8% | 339 | 3.2% | 2.6% | -43 | -0.4pp |
| Total | 10,664 | 100.0% | 100.0% | 10,486 | 100.0% | 100.0% | +178 | 0.0pp |