Age Structure (Irish 1821 classification)
| Age Groups used in 1821 Irish Census | 1821 |
|---|---|
| 0 to 4 |
5,657
|
| 5 to 9 |
5,154
|
| 10 to 14 |
4,271
|
| 15 to 19 |
4,477
|
| 20 to 29 |
6,484
|
| 30 to 39 |
4,063
|
| 40 to 49 |
2,379
|
| 50 to 59 |
2,082
|
| 60 to 69 |
817
|
| 70 to 79 |
276
|
| 80 to 89 |
41
|
| 90 to 99 |
5
|
| 100 Up |
0
|
| Age unknown |
3
|
| Date: | Source: |
|---|---|
| 1821 | 1821 Census of Ireland, Abstract of answers, Table [2] , 'Ages of Persons' |
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The early censuses 1801-31 used this very simple classification of occupations. The cemsuses of Great Britain from 1811 onwards applied it to families rather than persons, and all families were included under one of these headings.