Authier is a municipality in northwestern Quebec, Canada, in the Abitibi-Ouest Regional County Municipality. It had a population of 290 in the 2021 Canadian census.

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Authier
Municipality
Authier in summer
Location within Abitibi-Ouest RCM
Authier Location in western Quebec
Coordinates: 48°44′N 78°51′W[1]
Country	Canada
Province	Quebec
Region	Abitibi-Témiscamingue
RCM	Abitibi-Ouest
Settled	1913
Constituted	September 20, 1918
Government [2]
• Mayor	Yvon Gagné
• Federal riding	Abitibi—Témiscamingue
• Prov. riding	Abitibi-Ouest
Area [2][3]
• Total	143.54 km2 (55.42 sq mi)
• Land	142.22 km2 (54.91 sq mi)
Population  (2021)[3]
• Total	290
• Density	2.0/km2 (5/sq mi)
• Pop (2016-21)	8.2%
• Dwellings	134
Time zone	UTC−5 (EST)
• Summer (DST)	UTC−4 (EDT)
Postal code(s)	J0Z 1C0
Area code	819
Highways	R-111
Website	authier.ao.ca/fr/

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The municipality was constituted on September 20, 1918, and is named after Hector Authier (1881–1971).^[1]

Private dwellings occupied by usual residents (2021): 129 (total dwellings: 134)^[3]

Mother tongue (2021):^[3]

• English as first language: 0%
• French as first language: 98.3%
• English and French as first language: 1.7%
• Other as first language: 0%

Municipal council (as of 2023):^[5]

• Mayor: Yvon Gagné
• Councillors: Nathalie Gaudette, Angèle Auger, Cindy Demers, Ghislain Desaulniers, Véronique Hince, François Deschênes

List of former mayors:

This list is incomplete; you can help by adding missing items. (July 2023)

• Rita Julien (...–2001)
• Pierre Lambert (2005–2013)
• Marcel Cloutier (2013–2022)
• Yvon Gagné (2022–present)