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 Sydenham (NSW), accounting for 12.5% (137 people). This share was higher than Inner West (A) (9.9%). Since 2016, the biggest change was in 30 to 34 year olds, which increased by 137 people and 12.5 percentage points.
Section overview
Age structure - Five year age groups
Sydenham (NSW) - Total persons (Usual residence)
This table summarises five year age groups for Sydenham (NSW) in 2021 for persons, with comparison against Inner West (A) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Sydenham (NSW), with comparison markers for Inner West (A).
0 to 4
2021 count
41
% of total
3.7%
Change from 2016
+3.7pp
41
3.7%
+3.7pp
5 to 9
2021 count
47
% of total
4.3%
Change from 2016
+4.3pp
47
4.3%
+4.3pp
10 to 14
2021 count
30
% of total
2.7%
Change from 2016
+2.7pp
30
2.7%
+2.7pp
15 to 19
2021 count
24
% of total
2.2%
Change from 2016
+2.2pp
24
2.2%
+2.2pp
20 to 24
2021 count
85
% of total
7.7%
Change from 2016
+7.7pp
85
7.7%
+7.7pp
25 to 29
2021 count
132
% of total
12.0%
Change from 2016
+12.0pp
132
12.0%
+12.0pp
30 to 34
2021 count
137
% of total
12.5%
Change from 2016
+12.5pp
137
12.5%
+12.5pp
35 to 39
2021 count
112
% of total
10.2%
Change from 2016
+10.2pp
112
10.2%
+10.2pp
40 to 44
2021 count
99
% of total
9.0%
Change from 2016
-1.7pp
99
9.0%
-1.7pp
45 to 49
2021 count
70
% of total
6.4%
Change from 2016
+6.4pp
70
6.4%
+6.4pp
50 to 54
2021 count
65
% of total
5.9%
Change from 2016
-4.8pp
65
5.9%
-4.8pp
55 to 59
2021 count
46
% of total
4.2%
Change from 2016
+4.2pp
46
4.2%
+4.2pp
60 to 64
2021 count
41
% of total
3.7%
Change from 2016
-7.0pp
41
3.7%
-7.0pp
65 to 69
2021 count
43
% of total
3.9%
Change from 2016
+3.9pp
43
3.9%
+3.9pp
70 to 74
2021 count
37
% of total
3.4%
Change from 2016
+3.4pp
37
3.4%
+3.4pp
75 to 79
2021 count
20
% of total
1.8%
Change from 2016
+1.8pp
20
1.8%
+1.8pp
80 to 84
2021 count
16
% of total
1.5%
Change from 2016
+1.5pp
16
1.5%
+1.5pp
85 and over
2021 count
20
% of total
1.8%
Change from 2016
+1.8pp
20
1.8%
+1.8pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
+41
+3.7pp
5 to 9
+47
+4.3pp
10 to 14
+30
+2.7pp
15 to 19
+24
+2.2pp
20 to 24
+85
+7.7pp
25 to 29
+132
+12.0pp
30 to 34
+137
+12.5pp
35 to 39
+112
+10.2pp
40 to 44
+96
-1.7pp
45 to 49
+70
+6.4pp
50 to 54
+62
-4.8pp
55 to 59
+46
+4.2pp
60 to 64
+38
-7.0pp
65 to 69
+43
+3.9pp
70 to 74
+37
+3.4pp
75 to 79
+20
+1.8pp
80 to 84
+16
+1.5pp
85 and over
+20
+1.8pp
Data table
Five year age groups for Sydenham (NSW). Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Inner West (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Inner West (A)% | Count | % | Inner West (A)% | Count | pp | |
| 0 to 4 | 41 | 3.7% | 5.0% | 0 | 0.0% | 5.9% | +41 | +3.7pp |
| 5 to 9 | 47 | 4.3% | 4.8% | 0 | 0.0% | 5.3% | +47 | +4.3pp |
| 10 to 14 | 30 | 2.7% | 4.8% | 0 | 0.0% | 4.1% | +30 | +2.7pp |
| 15 to 19 | 24 | 2.2% | 4.1% | 0 | 0.0% | 3.7% | +24 | +2.2pp |
| 20 to 24 | 85 | 7.7% | 6.2% | 0 | 0.0% | 7.0% | +85 | +7.7pp |
| 25 to 29 | 132 | 12.0% | 9.4% | 0 | 0.0% | 10.1% | +132 | +12.0pp |
| 30 to 34 | 137 | 12.5% | 9.9% | 0 | 0.0% | 10.2% | +137 | +12.5pp |
| 35 to 39 | 112 | 10.2% | 9.0% | 0 | 0.0% | 9.0% | +112 | +10.2pp |
| 40 to 44 | 99 | 9.0% | 7.7% | 3 | 10.7% | 8.4% | +96 | -1.7pp |
| 45 to 49 | 70 | 6.4% | 7.5% | 0 | 0.0% | 7.4% | +70 | +6.4pp |
| 50 to 54 | 65 | 5.9% | 6.8% | 3 | 10.7% | 6.5% | +62 | -4.8pp |
| 55 to 59 | 46 | 4.2% | 5.9% | 0 | 0.0% | 5.5% | +46 | +4.2pp |
| 60 to 64 | 41 | 3.7% | 4.9% | 3 | 10.7% | 4.7% | +38 | -7.0pp |
| 65 to 69 | 43 | 3.9% | 4.2% | 0 | 0.0% | 3.9% | +43 | +3.9pp |
| 70 to 74 | 37 | 3.4% | 3.6% | 0 | 0.0% | 2.8% | +37 | +3.4pp |
| 75 to 79 | 20 | 1.8% | 2.5% | 0 | 0.0% | 2.1% | +20 | +1.8pp |
| 80 to 84 | 16 | 1.5% | 1.8% | 0 | 0.0% | 1.7% | +16 | +1.5pp |
| 85 and over | 20 | 1.8% | 2.0% | 0 | 0.0% | 1.7% | +20 | +1.8pp |
| Total | 1,100 | 100.0% | 100.0% | 28 | 100.0% | 100.0% | +1,072 | 0.0pp |