Census of Down Full government censuses were taken of the whole island in 1821, 1831, 1841, 1851, 1861, 1871, 1881, 1891 1901, and 1911. The first four, for 1821, 1831, 1841, and 1851, were largely destroyed in 1922, in the fire at the Public Record Office; surviving fragments are detailed under the county source-lists. Those for 1861, 1871, 1881, and 1891 were completely destroyed earlier, by order of the government. This means that the earliest surviving comprehensive returns are for 1901 and 1911 and the original returns can be consulted in the National Archives of Ireland.
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