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 Emerton, accounting for 8.7% (200 people). This share was higher than Blacktown (C) (7.3%). Since 2016, the biggest change was in 40 to 44 year olds, which decreased by 56 people and 2.5 percentage points.
Section overview
Age structure - Five year age groups
Emerton - Total persons (Usual residence)
This table summarises five year age groups for Emerton in 2021 for persons, with comparison against Blacktown (C) and change since 2016.
Age structure - Five year age groups snapshot
2021 distribution by category for Emerton, with comparison markers for Blacktown (C).
0 to 4
2021 count
177
% of total
7.7%
Change from 2016
-1.8pp
177
7.7%
-1.8pp
5 to 9
2021 count
194
% of total
8.5%
Change from 2016
+0.2pp
194
8.5%
+0.2pp
10 to 14
2021 count
200
% of total
8.7%
Change from 2016
+0.8pp
200
8.7%
+0.8pp
15 to 19
2021 count
165
% of total
7.2%
Change from 2016
+0.3pp
165
7.2%
+0.3pp
20 to 24
2021 count
170
% of total
7.4%
Change from 2016
-1.2pp
170
7.4%
-1.2pp
25 to 29
2021 count
172
% of total
7.5%
Change from 2016
+0.8pp
172
7.5%
+0.8pp
30 to 34
2021 count
159
% of total
6.9%
Change from 2016
+0.6pp
159
6.9%
+0.6pp
35 to 39
2021 count
132
% of total
5.8%
Change from 2016
+1.9pp
132
5.8%
+1.9pp
40 to 44
2021 count
100
% of total
4.4%
Change from 2016
-2.5pp
100
4.4%
-2.5pp
45 to 49
2021 count
143
% of total
6.2%
Change from 2016
+0.3pp
143
6.2%
+0.3pp
50 to 54
2021 count
126
% of total
5.5%
Change from 2016
-1.1pp
126
5.5%
-1.1pp
55 to 59
2021 count
138
% of total
6.0%
Change from 2016
+1.3pp
138
6.0%
+1.3pp
60 to 64
2021 count
116
% of total
5.1%
Change from 2016
-0.1pp
116
5.1%
-0.1pp
65 to 69
2021 count
93
% of total
4.1%
Change from 2016
-0.5pp
93
4.1%
-0.5pp
70 to 74
2021 count
86
% of total
3.7%
Change from 2016
-1.0pp
86
3.7%
-1.0pp
75 to 79
2021 count
81
% of total
3.5%
Change from 2016
+1.3pp
81
3.5%
+1.3pp
80 to 84
2021 count
41
% of total
1.8%
Change from 2016
+0.8pp
41
1.8%
+0.8pp
85 and over
2021 count
19
% of total
0.8%
Change from 2016
+0.4pp
19
0.8%
+0.4pp
Chart view
Age structure - Five year age groups change
Absolute change in category counts between 2016 and 2021.
0 to 4
-37
-1.8pp
5 to 9
+6
+0.2pp
10 to 14
+22
+0.8pp
15 to 19
+10
+0.3pp
20 to 24
-23
-1.2pp
25 to 29
+21
+0.8pp
30 to 34
+17
+0.6pp
35 to 39
+44
+1.9pp
40 to 44
-56
-2.5pp
45 to 49
+10
+0.3pp
50 to 54
-23
-1.1pp
55 to 59
+33
+1.3pp
60 to 64
-1
-0.1pp
65 to 69
-10
-0.5pp
70 to 74
-19
-1.0pp
75 to 79
+31
+1.3pp
80 to 84
+18
+0.8pp
85 and over
+9
+0.4pp
Data table
Five year age groups for Emerton. Age structure - Five year age groups. 2021 and 2016 counts, percentages, and change compared with Blacktown (C).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Blacktown (C)% | Count | % | Blacktown (C)% | Count | pp | |
| 0 to 4 | 177 | 7.7% | 7.5% | 214 | 9.5% | 8.0% | -37 | -1.8pp |
| 5 to 9 | 194 | 8.5% | 7.9% | 188 | 8.3% | 7.9% | +6 | +0.2pp |
| 10 to 14 | 200 | 8.7% | 7.3% | 178 | 7.9% | 6.9% | +22 | +0.8pp |
| 15 to 19 | 165 | 7.2% | 6.1% | 155 | 6.9% | 6.9% | +10 | +0.3pp |
| 20 to 24 | 170 | 7.4% | 6.7% | 193 | 8.6% | 6.8% | -23 | -1.2pp |
| 25 to 29 | 172 | 7.5% | 7.0% | 151 | 6.7% | 7.2% | +21 | +0.8pp |
| 30 to 34 | 159 | 6.9% | 7.9% | 142 | 6.3% | 8.3% | +17 | +0.6pp |
| 35 to 39 | 132 | 5.8% | 9.2% | 88 | 3.9% | 8.1% | +44 | +1.9pp |
| 40 to 44 | 100 | 4.4% | 7.8% | 156 | 6.9% | 7.2% | -56 | -2.5pp |
| 45 to 49 | 143 | 6.2% | 6.4% | 133 | 5.9% | 6.5% | +10 | +0.3pp |
| 50 to 54 | 126 | 5.5% | 5.6% | 149 | 6.6% | 6.0% | -23 | -1.1pp |
| 55 to 59 | 138 | 6.0% | 5.1% | 105 | 4.7% | 5.4% | +33 | +1.3pp |
| 60 to 64 | 116 | 5.1% | 4.5% | 117 | 5.2% | 4.6% | -1 | -0.1pp |
| 65 to 69 | 93 | 4.1% | 3.7% | 103 | 4.6% | 3.8% | -10 | -0.5pp |
| 70 to 74 | 86 | 3.7% | 3.1% | 105 | 4.7% | 2.5% | -19 | -1.0pp |
| 75 to 79 | 81 | 3.5% | 1.9% | 50 | 2.2% | 1.7% | +31 | +1.3pp |
| 80 to 84 | 41 | 1.8% | 1.2% | 23 | 1.0% | 1.1% | +18 | +0.8pp |
| 85 and over | 19 | 0.8% | 1.1% | 10 | 0.4% | 1.1% | +9 | +0.4pp |
| Total | 2,295 | 100.0% | 100.0% | 2,252 | 100.0% | 100.0% | +43 | 0.0pp |