William O'Sullivan

William O'Sullivan (1873 – 3 March 1953) was an Irish politician and medical doctor. He was a Cumann na nGaedheal member of Seanad Éireann from 1922 to 1936. He was first elected to the Seanad in 1922 for 9 years and was re-elected in 1931 for 6 years. He was educated at St Brendan's College, Killarney, University College Cork and the Royal College of Surgeons of Edinburgh.

He practised for many years in Killarney where he was Medical officer of health and county coroner for East Kerry. He died at his home, Inch House, Killarney, on 3 March 1953, aged 79. A noted sportsman himself he was the father of Billy O'Sullivan, an international Irish golfer and golf administrator.