Charles Clive Bigham, 2nd Viscount Mersey, CMG, CBE, PC (18 August 1872 – 20 November 1956) was a British peer and Liberal politician.
The son of John Bigham, 1st Viscount Mersey, Bigham was educated at Eton (where he was a King's Scholar) and Sandhurst, and was commissioned into the Grenadier Guards in 1892. From 1896 to 1900 he held various appointments within the Diplomatic Service. In 1900, he served as intelligence office to Admiral Sir Edward Seymour during the abortive Seymour Expedition, for which he was mentioned in dispatches.
He was Deputy Speaker of the House of Lords from 1933 and served as Liberal Chief Whip in the House of Lords from 1944 to 1949. In 1946 he was appointed to the Privy Council.
Mersey died on 20 November 1956 and was succeeded in his peerages by his son Edward Clive Bigham, 3rd Viscount Mersey.