+ Census population of the municipal borough of KeighleyYear 1901 1911 1921 1931 1939 † 1951 1961 1971 2011Population 41,564 43,487 41,921 40,441 56,631 56,944 55,845 55,32556,348Source: Vision of Britain – Keighley MB: Total Population. † The 1939 population is estimated from the National Registration Act figures. The 1941 census did not take place because of the Second World War.
+ Census population of the municipal borough of KeighleyYear 1901 1911 1921 1931 1939 † 1951 1961 1971 2011Population 41,564 43,487 41,921 40,441 56,631 56,944 55,845 55,32556,348Source: Vision of Britain – Keighley MB: Total Population. † The 1939 popula?tion is estimated from the National Registra.tion Act figures. The 1941 census did not take place because of the Second World War.