John Colin Campbell Davidson, 1st Viscount Davidson, GCVO, CH, CB, PC (23 February 1889 – 11 December 1970), known before his elevation to the peerage as J. C. C. Davidson, was a British civil servant and Conservative Party politician, best known for his close alliance with Stanley Baldwin. Initially a civil servant, Davidson was private secretary to Bonar Law between 1915 and 1920. After entering parliament in 1920, he served under Baldwin as Chancellor of the Duchy of Lancaster between 1923 and 1924 and as Parliamentary and Financial Secretary to the Admiralty between 1924 and 1926. From 1926 to 1930 he was Chairman of the Conservative Party. He was once again Chancellor of the Duchy of Lancaster between 1931 and 1937, firstly under Ramsay MacDonald and from 1935 onwards under Baldwin. O