Terry Leyden (born 1 October 1945) is an Irish Fianna Fáil politician. Formerly a Teachta Dála (TD), he is a member of Seanad Éireann.An architect by profession, he was elected to Roscommon County Council in 1974, and re-elected in 1979 and 1985. Leyden was elected to Dáil Éireann on his first attempt, at the 1977 general election, when he was returned to the 21st Dáil as a TD for the Roscommon–Leitrim constituency.