The oldest part of Baie-Comeau is the area known as
Vieux-Poste (Old Post) near the mouth of the
Amédée River where in 1889, the Saint-Eugène-de-Manicouagan Mission was founded by
Eudists. In 1898, the first sawmill in the Côte-Nord region was built there by the brothers Damase and Henri Jalbert, but it closed in 1907 after their timber stock was swept into the St. Lawrence. In 1916,
Route 138 was extended to Saint-Eugène-de-Manicouagan and in 1929, its post office opened with the English name of (
francized in 1936). Baie-Comeau itself (the eastern part of the current town) was founded in 1936 when a paper mill was constructed by Colonel
Robert R. McCormick, publisher of the
Chicago Tribune.
Arthur A. Schmon oversaw the project, which included a power station and housing. Experiencing remarkable growth, the Town of Baie-Comeau was incorporated on May 20, 1937. Coinciding with the completion of the mill, the
Hudson's Bay Company opened a store on September 15 of that same year. It was the first HBC small department store in Quebec. The area continued to see economic development with the establishment of the hydro-electric power stations on the
Manicouagan and
Outardes Rivers beginning with the Chutes-aux-Outardes Station in 1952, an aluminum smelter in 1958, and grain warehouses (the largest in Canada) in 1959. ==Geography==