Rupert's Land, in which Abitibi was located, was owned by the Hudson's Bay Company and was bought by Canada in 1869.

A related municipality was created in 1917 under the name 'Municipalité de la partie ouest des cantons unis de Figuery et Dalquier' (Municipality of the western part of the united townships of Figuery and Dalquier) which changed its name to Amos-Ouest in 1949.

[10] Its main resources are spring water, gold, and wood products, including paper.

In the National Assembly of Quebec, Amos is within the electoral district of Abitibi-Ouest, represented by Coalition Avenir Québec MNA Suzanne Blais.

In the House of Commons of Canada, the city is in the Abitibi—Témiscamingue district, represented by Bloc Québécois MP Sébastien Lemire.

[13] List of former mayors:[14] Passenger trains no longer serve Amos, but the town once had a Canadian National Railway station.