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Population Statistics for Llanddewi
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Area, Houses and Population
| Census Year | Area in Statute Acres | Houses | Population | ||||
| Inhabited | Uninhabited | Building | Persons | Male | Female | ||
| 1841 | - | 27 | 3 | - | 164 | 89 | 75 |
| 1851 | 1853 | 30 | - | - | 174 | 97 | 77 |
| 1861 | 1853 | 29 | - | - | 149 | 84 | 65 |
| 1871 | 1853 | 28 | 1 | - | 141 | 79 | 62 |
| 1881 | 2010 | 22 | 4 | - | 108 | 56 | 52 |
| 1891 | 2010 | 24 | - | 1 | 119 | 61 | 58 |
Population Statistics for Llanddewi [Last Updated : 19 Sept 2002 - Gareth Hicks]