Port Arthur, Ontario

Port Arthur was a city in Northern Ontario, Canada, located on Lake Superior. In January 1970, it was amalgamated with Fort William and the townships of Neebing and McIntyre to form the city of Thunder Bay. Port Arthur became the district seat of Thunder Bay District with the appointment in June 1871 of Delevan Decatur Van Norman as the district's first stipendiary magistrate.

It is historically notable as a temporary (1882–1885) eastern terminus of the Canadian Pacific Railway (CPR). It served as a major transshipment point for lakers that carried cargo to Port Arthur from across the Great Lakes. CPR's completion to the east did little to affect the city's importance for shipping; the Canadian Northern Railway was constructed to serve the port, and it built numerous grain silos to supply lakers. This rail and grain trade diminished in the latter half of the 20th century.