Carleton is a federal electoral district in Ontario, Canada, represented in the House of Commons of Canada from 1867 to 1968 and since 2015. It was represented in the Legislative Assembly of Upper Canada from 1821 to 1840 and in the Legislative Assembly of the Province of Canada from 1841 until 1866. It is represented by Bruce Fanjoy who defeated Pierre Poilievre, the current Leader of the Opposition.