Thomas F. Kilroy (born 23 September 1934) is an Irish playwright and novelist.
He was born in Green Street, Callan, County Kilkenny and studied at University College, Dublin. In his early career he was play editor at the Abbey Theatre, Dublin. In the 1980s, he sat on the board of Field Day Theatre Company, founded by Brian Friel and Stephen Rea in 1980, and was Director of its touring company. He became Professor of English in University College, Galway, a post from which he resigned in 1989 to concentrate on writing. He now lives in County Mayo and is a member of the Irish Academy of Letters, the Royal Society of Literature, and Aosdána.