Christopher John Mullin (born December 12, 1947) is the Labour member of Parliament for the English constituency of Sunderland South. He is a member of the Socialist Campaign Group, and had been an editor of Tribune Magazine.

His constituency was the first to declare after the general election of May 1, 1997. Despite his criticism of the government, he was made a junior minister from 1999 to 2001, and again from 2003.