Cochrane (also known as Cochrane North and Cochrane—Superior) was a federal and provincial electoral district in the province of Ontario, Canada. It was represented in the Canadian House of Commons from 1935 to 1997 and in the Legislative Assembly of Ontario from 1914 until 1998.
This riding was created in 1933 as "Cochrane" from parts of Timiskaming North riding. The electoral district was abolished in 1996 when it was redistributed between Algoma, Kenora—Rainy River, Thunder Bay—Nipigon, Timiskaming—Cochrane and Timmins—James Bay ridings.
It initially consisted of the northern part of the territorial district of Timiskaming, and the eastern part of the territorial district of Cochrane and the district of Patricia. In Timiskaming, the riding included the part of the district lying north of and including the townships of Pontiac and Keefer and the townships in between them. In Cochrane, it included the part of the district lying east of a line drawn along the eastern boundaries of the townships of McCoig and Mulloy and north to the northern limit of the district. In Patricia, it included the part lying east of the projection north of the western boundary of the electoral district of Cochrane.
In 1947, it was redefined to consist of the northern part of the territorial district of Cochrane and the eastern part of the district of Patricia. In the 1960s, it was redefined to consist of the northern parts of the territorial district of Algoma, Cochrane, Kenora (Patricia Portion), Sudbury and Timiskaming.
The electoral district was abolished in 1976 when it was redistributed between Algoma, Cochrane North, Timiskaming and Timmins—Chapleau ridings.