William Thomas Bain (born 29 November 1972) is a Scottish politician who served as Member of Parliament (MP) for Glasgow North East from 2009 to 2015.

Born at Stobhill Hospital in Glasgow, son of William, a lift engineer, and Catherine, a payroll clerk, Willie Bain grew up in the Carron area of Springburn.

[2] Raised in the Roman Catholic faith, Bain attended St Roch's Secondary School and Strathclyde University, graduating with a LLB in 1995.

Thereafter, he completed a Diploma in Legal Practice in 1996, and moved into part-time lecturing and research at the University of Strathclyde Law School, working with the Law School's Centre for Parliamentary and Legislative Studies on research projects on devolution.

[4] Following the resignation of local MP and Speaker of the House of Commons Michael Martin, William Bain was selected by the local CLP as the Labour candidate in the 2009 Glasgow North East by-election, subsequently winning the seat.