Northern Ireland. General Register Office

• Census 1971, Northern Ireland, summary tables
• The Northern Ireland census, 1991
• Census of population of Northern Ireland, 1926
• Census of population of Northern Ireland, 1937
• Census of population of Northern Ireland, 1951
• Census of population of Northern Ireland, 1961
• Census of population of Northern Ireland, 1966
• Census of population, 1961
• The Northern Ireland Census 1981
• The Northern Ireland Census 1981
• The Northern Ireland Census 1981
• The Northern Ireland census 1991 preliminary report