Cardiff South was a borough constituency in Cardiff, Wales. It returned one Member of Parliament to the House of Commons of the Parliament of the United Kingdom. The constituency was created for the 1918 general election, and abolished for the 1950 general election. Its final MP was Labour's James Callaghan, elected in 1945 at the age of 33, who would go on to serve the party until 1987, including a spell as prime minister from 1976 to 1979 after several roles in the governments of Harold Wilson. Boundaries The County Borough of Cardiff wards of Adamsdown, Grangetown, and South, and the Urban District of Penarth. Members of Parliament Election results Elections in the 1910s Elections in the 1920s Elections in the 1930s General Election 1939–40: Another General Election was required to take place before the end of 1940. The political parties had been making preparations for an election to take place and by the Autumn of 1939, the following candidates had been selected; Conservative: Henry Arthur Evans Labour: Sir William Allen Jowitt Elections in the 1940s References Politics of Cardiff History of Glamorgan Historic parliamentary constituencies in South Wales Constituencies of the Parliament of the United Kingdom established in 1918 Constituencies of the Parliament of the United Kingdom disestablished in 1950