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, 50 to 54 year olds was the largest age group among residents in Kogarah Bay, accounting for 8.3% (175 people). This share was higher than Georges River (A) (6.2%). Since 2016, the biggest change was in 60 to 64 year olds, which increased by 73 people and 3.3 percentage points.
Section overview
Age structure - Five year age groups
Kogarah Bay - Total persons (Usual residence)
This table summarises five year age groups for Kogarah Bay 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 Kogarah Bay, with comparison markers for Georges River (A).
0 to 4
2021 count
76
% of total
3.6%
Change from 2016
-1.2pp
76
3.6%
-1.2pp
5 to 9
2021 count
107
% of total
5.1%
Change from 2016
-2.5pp
107
5.1%
-2.5pp
10 to 14
2021 count
168
% of total
8.0%
Change from 2016
+2.2pp
168
8.0%
+2.2pp
15 to 19
2021 count
154
% of total
7.3%
Change from 2016
+0.2pp
154
7.3%
+0.2pp
20 to 24
2021 count
144
% of total
6.9%
Change from 2016
0.0pp
144
6.9%
0.0pp
25 to 29
2021 count
116
% of total
5.5%
Change from 2016
+0.3pp
116
5.5%
+0.3pp
30 to 34
2021 count
83
% of total
3.9%
Change from 2016
-1.4pp
83
3.9%
-1.4pp
35 to 39
2021 count
101
% of total
4.8%
Change from 2016
-0.8pp
101
4.8%
-0.8pp
40 to 44
2021 count
123
% of total
5.9%
Change from 2016
-1.0pp
123
5.9%
-1.0pp
45 to 49
2021 count
144
% of total
6.9%
Change from 2016
-1.2pp
144
6.9%
-1.2pp
50 to 54
2021 count
175
% of total
8.3%
Change from 2016
+0.3pp
175
8.3%
+0.3pp
55 to 59
2021 count
170
% of total
8.1%
Change from 2016
+0.3pp
170
8.1%
+0.3pp
60 to 64
2021 count
159
% of total
7.6%
Change from 2016
+3.3pp
159
7.6%
+3.3pp
65 to 69
2021 count
107
% of total
5.1%
Change from 2016
+0.2pp
107
5.1%
+0.2pp
70 to 74
2021 count
83
% of total
3.9%
Change from 2016
+0.2pp
83
3.9%
+0.2pp
75 to 79
2021 count
83
% of total
3.9%
Change from 2016
+0.9pp
83
3.9%
+0.9pp
80 to 84
2021 count
62
% of total
2.9%
Change from 2016
+0.3pp
62
2.9%
+0.3pp
85 and over
2021 count
60
% of total
2.9%
Change from 2016
+0.2pp
60
2.9%
+0.2pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-22
-1.2pp
5 to 9
-46
-2.5pp
10 to 14
+51
+2.2pp
15 to 19
+10
+0.2pp
20 to 24
+5
0.0pp
25 to 29
+10
+0.3pp
30 to 34
-25
-1.4pp
35 to 39
-13
-0.8pp
40 to 44
-16
-1.0pp
45 to 49
-20
-1.2pp
50 to 54
+13
+0.3pp
55 to 59
+12
+0.3pp
60 to 64
+73
+3.3pp
65 to 69
+8
+0.2pp
70 to 74
+9
+0.2pp
75 to 79
+23
+0.9pp
80 to 84
+10
+0.3pp
85 and over
+6
+0.2pp
Data table
Five year age groups for Kogarah Bay. 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 | 76 | 3.6% | 5.0% | 98 | 4.8% | 5.8% | -22 | -1.2pp |
| 5 to 9 | 107 | 5.1% | 5.5% | 153 | 7.6% | 5.6% | -46 | -2.5pp |
| 10 to 14 | 168 | 8.0% | 5.4% | 117 | 5.8% | 5.3% | +51 | +2.2pp |
| 15 to 19 | 154 | 7.3% | 5.3% | 144 | 7.1% | 6.1% | +10 | +0.2pp |
| 20 to 24 | 144 | 6.9% | 7.6% | 139 | 6.9% | 7.6% | +5 | 0.0pp |
| 25 to 29 | 116 | 5.5% | 8.0% | 106 | 5.2% | 8.7% | +10 | +0.3pp |
| 30 to 34 | 83 | 3.9% | 7.5% | 108 | 5.3% | 7.9% | -25 | -1.4pp |
| 35 to 39 | 101 | 4.8% | 7.2% | 114 | 5.6% | 6.6% | -13 | -0.8pp |
| 40 to 44 | 123 | 5.9% | 6.3% | 139 | 6.9% | 6.5% | -16 | -1.0pp |
| 45 to 49 | 144 | 6.9% | 6.3% | 164 | 8.1% | 6.5% | -20 | -1.2pp |
| 50 to 54 | 175 | 8.3% | 6.2% | 162 | 8.0% | 6.6% | +13 | +0.3pp |
| 55 to 59 | 170 | 8.1% | 6.3% | 158 | 7.8% | 6.1% | +12 | +0.3pp |
| 60 to 64 | 159 | 7.6% | 5.9% | 86 | 4.3% | 5.2% | +73 | +3.3pp |
| 65 to 69 | 107 | 5.1% | 4.9% | 99 | 4.9% | 4.5% | +8 | +0.2pp |
| 70 to 74 | 83 | 3.9% | 4.2% | 74 | 3.7% | 3.4% | +9 | +0.2pp |
| 75 to 79 | 83 | 3.9% | 3.1% | 60 | 3.0% | 2.7% | +23 | +0.9pp |
| 80 to 84 | 62 | 2.9% | 2.3% | 52 | 2.6% | 2.2% | +10 | +0.3pp |
| 85 and over | 60 | 2.9% | 2.8% | 54 | 2.7% | 2.6% | +6 | +0.2pp |
| Total | 2,102 | 100.0% | 100.0% | 2,022 | 100.0% | 100.0% | +80 | 0.0pp |