Thomas Mullen (20 June 1896 – 2 January 1966) was an Irish Fianna Fáil politician and school teacher. He was born in Roemore, Breaffy, County Mayo, to primary school teacher parents, Thomas and Mary Mullen (née Coggins) He was educated at St Jarlath's College, Tuam, and University College Galway. He too became a teacher and taught in Tullamore and North Brunswick St and at St Saviour's, Denmark St, in Dublin. He was elected to Dáil Éireann as a Teachta Dála (TD) for the Dublin County constituency at the 1938 general election. He did not contest the 1943 general election.