Toddy O'Sullivan (born 1 December 1934) is a former Irish Labour Party politician who served for sixteen years as a Teachta Dála (TD) for constituencies in Cork, and for five years as a junior minister.
He also served as Lord Mayor of Cork from 1980 to 1981.
A native of the Barrack Street area in the south inner city area of Cork, O'Sullivan was educated at Greenmount National School before becoming a postal clerk.