The Diocese of Amos (French: Diocèse d'Amos, Latin: Dioecesis Amosensis) is a Latin Church ecclesiastical territory or diocese of the Catholic Church that covers part of the Province of Quebec.

The diocese was erected by Pope Pius XI on December 3, 1938.

Joseph-Aldée Desmarais was named its first bishop on June 20, 1939 by Pope Pius XII.

[1] The diocese was headed by Gilles Lemay, formerly an auxiliary bishop of the Archdiocese of Quebec, until his resignation on September 16, 2023, upon reaching the mandatory retirement age for bishops of 75.

The diocese has 35 priests, 47 Religious Sisters,[2] and 91,600 Catholics (2012).