Prince Edward—Lennox was a federal electoral district represented in the House of Commons of Canada from 1925 to 1968.

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.

The electoral district was abolished in 1966 when it was redistributed between Prince Edward—Hastings, Kingston and the Islands and Frontenac—Lennox and Addington ridings.

This riding elected the following members of the House of Commons of Canada: