Cochrane (federal electoral district)

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.

"Cochrane North" was formed in 1976 from parts of Cochrane and Thunder Bay ridings. It consisted of the northern part of the Territorial District of Algoma, northwest part of the Territorial District of Cochrane, the eastern part of the Territorial District of Kenora (Patricia Portion), and the southeast part of the Territorial District of Thunder Bay. The name of the electoral district was changed in 1977 to "Cochrane", and in 1980 to "Cochrane—Superior".

Cochrane—Superior initially consisted of the northern part of the Territorial District of Algoma, the north-west of the Territorial District of Cochrane, the eastern part of the Territorial District of Kenora (Patricia Portion), and the south-east part of the Territorial District of Thunder Bay.

It was redefined in 1987 to consist of the north-east part of the Territorial District of Algoma, the north-west part of the Territorial District of Cochrane, the eastern part of the Territorial District of Kenora, and the eastern part of the Territorial District of Thunder Bay.