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, 10 to 14 year olds was the largest age group among residents in Fairfield West, accounting for 7.4% (965 people). This share was higher than Fairfield (C) (6.6%). Since 2016, the biggest change was in 20 to 24 year olds, which increased by 952 people and 4 percentage points.
Section overview
Age structure - Five year age groups
Fairfield West - Total persons (Usual residence)
This table summarises five year age groups for Fairfield West in 2021 for persons, with comparison against Fairfield (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Fairfield West, with comparison markers for Fairfield (C).
0 to 4
2021 count
760
% of total
5.9%
Change from 2016
+2.0pp
760
5.9%
+2.0pp
5 to 9
2021 count
897
% of total
6.9%
Change from 2016
+1.4pp
897
6.9%
+1.4pp
10 to 14
2021 count
965
% of total
7.4%
Change from 2016
-0.4pp
965
7.4%
-0.4pp
15 to 19
2021 count
931
% of total
7.2%
Change from 2016
+0.2pp
931
7.2%
+0.2pp
20 to 24
2021 count
965
% of total
7.4%
Change from 2016
+4.0pp
965
7.4%
+4.0pp
25 to 29
2021 count
874
% of total
6.7%
Change from 2016
+5.9pp
874
6.7%
+5.9pp
30 to 34
2021 count
774
% of total
6.0%
Change from 2016
+2.9pp
774
6.0%
+2.9pp
35 to 39
2021 count
825
% of total
6.4%
Change from 2016
-0.1pp
825
6.4%
-0.1pp
40 to 44
2021 count
795
% of total
6.1%
Change from 2016
+0.1pp
795
6.1%
+0.1pp
45 to 49
2021 count
842
% of total
6.5%
Change from 2016
+0.8pp
842
6.5%
+0.8pp
50 to 54
2021 count
829
% of total
6.4%
Change from 2016
+0.4pp
829
6.4%
+0.4pp
55 to 59
2021 count
856
% of total
6.6%
Change from 2016
-1.5pp
856
6.6%
-1.5pp
60 to 64
2021 count
679
% of total
5.2%
Change from 2016
-3.9pp
679
5.2%
-3.9pp
65 to 69
2021 count
586
% of total
4.5%
Change from 2016
-1.5pp
586
4.5%
-1.5pp
70 to 74
2021 count
504
% of total
3.9%
Change from 2016
-2.9pp
504
3.9%
-2.9pp
75 to 79
2021 count
430
% of total
3.3%
Change from 2016
-0.6pp
430
3.3%
-0.6pp
80 to 84
2021 count
283
% of total
2.2%
Change from 2016
-0.9pp
283
2.2%
-0.9pp
85 and over
2021 count
176
% of total
1.4%
Change from 2016
-1.7pp
176
1.4%
-1.7pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+745
+2.0pp
5 to 9
+876
+1.4pp
10 to 14
+935
-0.4pp
15 to 19
+904
+0.2pp
20 to 24
+952
+4.0pp
25 to 29
+871
+5.9pp
30 to 34
+762
+2.9pp
35 to 39
+800
-0.1pp
40 to 44
+772
+0.1pp
45 to 49
+820
+0.8pp
50 to 54
+806
+0.4pp
55 to 59
+825
-1.5pp
60 to 64
+644
-3.9pp
65 to 69
+563
-1.5pp
70 to 74
+478
-2.9pp
75 to 79
+415
-0.6pp
80 to 84
+271
-0.9pp
85 and over
+164
-1.7pp
Data table
Five year age groups for Fairfield West. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Fairfield (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Fairfield (C)% | Count | % | Fairfield (C)% | Count | pp | |
| 0 to 4 | 760 | 5.9% | 5.2% | 15 | 3.9% | 6.1% | +745 | +2.0pp |
| 5 to 9 | 897 | 6.9% | 6.1% | 21 | 5.5% | 6.4% | +876 | +1.4pp |
| 10 to 14 | 965 | 7.4% | 6.6% | 30 | 7.8% | 6.6% | +935 | -0.4pp |
| 15 to 19 | 931 | 7.2% | 6.9% | 27 | 7.0% | 7.1% | +904 | +0.2pp |
| 20 to 24 | 965 | 7.4% | 7.0% | 13 | 3.4% | 7.7% | +952 | +4.0pp |
| 25 to 29 | 874 | 6.7% | 6.8% | 3 | 0.8% | 7.1% | +871 | +5.9pp |
| 30 to 34 | 774 | 6.0% | 6.2% | 12 | 3.1% | 6.6% | +762 | +2.9pp |
| 35 to 39 | 825 | 6.4% | 6.1% | 25 | 6.5% | 6.0% | +800 | -0.1pp |
| 40 to 44 | 795 | 6.1% | 5.9% | 23 | 6.0% | 6.4% | +772 | +0.1pp |
| 45 to 49 | 842 | 6.5% | 6.4% | 22 | 5.7% | 6.8% | +820 | +0.8pp |
| 50 to 54 | 829 | 6.4% | 6.7% | 23 | 6.0% | 6.8% | +806 | +0.4pp |
| 55 to 59 | 856 | 6.6% | 6.8% | 31 | 8.1% | 6.8% | +825 | -1.5pp |
| 60 to 64 | 679 | 5.2% | 6.6% | 35 | 9.1% | 5.7% | +644 | -3.9pp |
| 65 to 69 | 586 | 4.5% | 5.5% | 23 | 6.0% | 4.6% | +563 | -1.5pp |
| 70 to 74 | 504 | 3.9% | 4.3% | 26 | 6.8% | 3.1% | +478 | -2.9pp |
| 75 to 79 | 430 | 3.3% | 2.8% | 15 | 3.9% | 2.5% | +415 | -0.6pp |
| 80 to 84 | 283 | 2.2% | 2.1% | 12 | 3.1% | 1.8% | +271 | -0.9pp |
| 85 and over | 176 | 1.4% | 2.1% | 12 | 3.1% | 1.8% | +164 | -1.7pp |
| Total | 12,981 | 100.0% | 100.0% | 385 | 100.0% | 100.0% | +12,596 | 0.0pp |