Frontenac was a federal electoral district represented in the House of Commons of Canada from 1867 to 1925.

It was created by the British North America Act of 1867.

In 1903, the riding was redefined to consist of the county of Frontenac, excluding the city of Kingston and the village of Portsmouth.

The electoral district was abolished in 1924 when it was merged into Frontenac—Addington riding.

This riding has elected the following members of Parliament: On Mr. Kirkpatrick's death, 26 March 1870: On Mr. Kirkpatrick being named Lieutenant-Governor of Ontario, 1 June 1892: