It was initially defined to consist of the southern parts of the territorial districts of Rainy River, Kenora and Thunder Bay adjacent to the southern boundary of Canada.
In 1947, it was defined to consist of the city of Fort William and the southern parts of the territorial districts of Rainy River, Kenora and Thunder Bay adjacent to by the southern boundary of Canada.
In 1966, it was defined to consist of the City of Fort William and the Townships of Aldina, Blake, Crooks, Devon, Fraleigh, Gillies, Hartington, Lismore, Lybster, Marks, Neebing, O'Connor, Paipoonge, Pardee, Pearson, Scoble and Strange in the territorial district of Thunder Bay.
The electoral district was abolished in 1976 when it was merged into Thunder Bay—Atikokan riding.
|- |Hon. Robert James Manion |align="right"| 5,173 |- |William Nassau Welsh |align="right"| 2,440 |}
|- |Hon. Robert James Manion |align="right"| 6,939 |- |Charles White Wilson |align="right"|3,262 |- |Albert Edward Smith |align="right"| 594 |}
On Mr. Manion being named Minister of Railways and Canals, 7 August 1930: |- |Hon. Robert James Manion |align="right"| acclaimed |}
|- |Daniel McIvor |align="right"| 5,481 |- |Hon. Robert James Manion |align="right"| 4,565 |- |Clement Edward Chapple |align="right"| 2,030 |- |Garfield Anderson |align="right"| 1,635 |- |John Joseph Spooner |align="right"| 78 |}
|- |Daniel McIvor |align="right"| 8,504 |- |Hon. Robert James Manion |align="right"| 6,768 |- |Garfield Anderson |align="right"| 1,778 |}
|- |Dan McIvor |align="right"| 7,209 |- |Wilfred Carson McKenzie |align="right"|5,858 |- |Robert Barclay Pow |align="right"| 4,945 |- |Donald Stewart |align="right"| 772 |}
|- |Dan McIvor |align="right"| 9,569 |- |J. Mac Spence |align="right"| 5,751 |- |Garfield Anderson |align="right"| 4,830 |- |Alvin L. Johnson |align="right"| 746 |}
|- |Dan McIvor |align="right"| 10,402 |- |Murray Babe |align="right"| 5,030 |- |William Johnson |align="right"| 3,847 |- |Naomi Mara Powell |align="right"| 508 |}
|- |Dan McIvor |align="right"| 8,552 |- |Art Widnall |align="right"| 7,926 |- |Michael Chicorli |align="right"| 5,903 |}
|- |Hubert Badanai |align="right"| 9,915 |- |Art Widnall |align="right"| 9,798 |- |Michael Chicorli |align="right"| 4,953 |- |Bruce A.H. Magnuson |align="right"| 224 |}
|- |Hubert Badanai |align="right"| 12,229 |- |Bernard Black (politician) |align="right"| |Edward G. Freeman |align="right"| 5,713 |- |Arthur W. Hutton |align="right"| 361 |}
|- |Hubert Badanai |align="right"| 11,765 |- |Edward G. Freeman |align="right"| 7,619 |- |C.B. Devlin |align="right"| 6,618 |- |Arthur W. Hutton |align="right"| 309 |}
|- |Hubert Badanai |align="right"| 12,432 |- |Charles A. Grant |align="right"| 8,993 |- |Ben Devlin |align="right"| 4,773 |}
|- |Hubert Badanai |align="right"| 10,635 |- |Charles A. Grant |align="right"| 7,394 |- |Lionel Hastings |align="right"| 7,284 |}
|- |Paul McRae |align="right"| 11,545 |- |Lionel Hastings |align="right"| 10,263 |- |Ian Stewart |align="right"| 7,497 |}
|- |Paul McRae |align="right"| 13,789 |- |Ty Kaipio |align="right"| 8,094 |- |Lawrence Timko |align="right"| 6,129 |- |Bruce Barrett |align="right"| 149 |- |Dianne Robinson |align="right"| 72 |}