Ghriss is a town and commune in Mascara Province, Algeria. According to the 1998 census it has a population of 22,151. It is located 18 km from Mascara and 120 km from Oran, rising to around 500 m in the Ghriss plain. Its name is derived from Aghris meaning "white frost". During the French colonial period, the town was named "Thiersville" after Adolphe Thiers, and its nearby airport Ghriss Airport was called "Thiersville Airfield" during the WWII.