Seán Thomas O'Kelly (; 25 August 1882 – 23 November 1966) was the second President of Ireland. He served two terms from 1945 to 1959. He was a member of Dáil Éireann from 1918 until his election as President. During this time he had been Minister for Local Government (1932–1939) and Minister for Finance (1939–1945). Ó Ceallaigh served as Vice-President of the Executive Council from 1932 until 1937 and was the first Tánaiste of Éire from 1937 until 1945.