Age Structure (Irish 1821 classification)
| Age Groups used in 1821 Irish Census | 1821 |
|---|---|
| 0 to 4 |
1,040,665
|
| 5 to 9 |
920,757
|
| 10 to 14 |
827,906
|
| 15 to 19 |
828,293
|
| 20 to 29 |
1,195,478
|
| 30 to 39 |
780,756
|
| 40 to 49 |
524,347
|
| 50 to 59 |
408,455
|
| 60 to 69 |
185,482
|
| 70 to 79 |
65,000
|
| 80 to 89 |
13,779
|
| 90 to 99 |
1,963
|
| 100 Up |
349
|
| Age unknown |
8,597
|
| Date: | Source: |
|---|---|
| 1821 | 1821 Census of Ireland, Abstract of answers, Table [2] , 'Ages of Persons' |
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This classification was used in the Enumeration Abstract of the 1821 Irish Census. Unusually, no breakdown by gender was included, and as a single group covers ages 60 to 69 this cannot be mapped to standard definitions of working age.