Michael John Keyes (21 March 1886 – 8 September 1959) was an Irish Labour Party politician and trade unionist. He was born on 21 March 1886 at 41 Blackboy Pike, Limerick city, the second son of Michael Keyes, caretaker, and his wife Hannah (née White). After being educated by the Christian Brothers at Sexton Street, Limerick, he began work as a clerk on the Waterford–Limerick railway line and subsequently served an apprenticeship in carpentry in the workshop of the Great Southern and Western Railway where he remained until 1927.