Prince Edward—Lennox was a federal electoral district represented in the House of Commons of Canada from 1925 to 1968. It was located in the province of Ontario. This riding was created in 1924 from Prince Edward riding and parts of Lennox and Addington riding. It initially consisted of the county of Prince Edward and the townships of Adolphustown, Amherst Island, Fredericksburg (North and South) and Richmond in the county of Lennox and Addington. In 1933, the township of Ernestown in the county of Lennox and Addington was added to the riding.