Lanark—Carleton (provincial electoral district)

Lanark—Carleton was a provincial electoral district (or riding) in Ontario. It existed for the 1999 and 2003 Ontario general elections.

The riding was created when Ontario's electoral districts were re-drawn to match its federal counterparts. It was created out of parts of Carleton and Lanark-Renfrew. It was abolished into Carleton—Mississippi Mills, Lanark—Frontenac—Lennox and Addington and a small piece going to Ottawa West—Nepean. The riding consisted of Lanark County and the municipalities of West Carleton and Kanata, which were both amalgamated into Ottawa in 2001.