The 1962 South Dorset by-election occurred following the death of George Montagu, 9th Earl of Sandwich on 15 June 1962. His son Viscount Hinchingbrooke, the incumbent MP for the constituency of South Dorset, was subsequently elevated to the peerage, becoming the 10th Earl of Sandwich. Following the Peerage Act 1963, the 10th Earl disclaimed his peerages in 1964, becoming Victor Montagu, but never sat in the House of Commons again.