Emrys Daniel Hughes was a Welsh Labour Party politician, journalist and author. He was Labour MP for South Ayrshire in Scotland from 1946 to 1969. Among his many published books was a biography of his father-in-law, Keir Hardie.

South Ayrshire was a county constituency of the House of Commons of the Parliament of the United Kingdom from 1868 until 1983, when it was abolished. It returned one Member of Parliament (MP), elected by the first past the post voting system.