Cosio di Arroscia is a comune (municipality) in the province of Imperia in the Italian region Liguria, located about 100 kilometres (62 mi) southwest of Genoa and about 25 kilometres (16 mi) northwest of Imperia.
The small village is situated in the Arroscia's high valley, at about from Imperia. Cosio di Arroscia borders the following municipalities: Briga Alta, Mendatica, Montegrosso Pian Latte, Ormea, and Pornassio. ==References==