Cyril Harry Alfred Lakin (29 December 1893 – 23 June 1948) was a Welsh politician and farmer who was the Conservative Party Member of Parliament (MP) for Llandaff and Barry in South Wales. He won the seat at a by-election in June 1942, with a 5,655 majority over an independent Labour candidate, but was defeated at the 1945 general election by the official Labour Party candidate Lynn Ungoed-Thomas.