Relizane () is a province (wilaya) of Algeria. Relizane is the capital.
The province was created from Mostaganem Province in 1984.
The Wilaya of Relizane massacres of 30 December 1997 and 4 January 1998 happened in Relizane, during the Algerian Civil War.
The province is divided into 13 districts (daïras), which are further divided into 38 communes or municipalities.
Other localities include Bendaoud, Bouzegza, Hamri, Kalaa, Mazouna, and Zemmoura.