Ceriano Laghetto [tʃerjaːno laɡɛtto] is a municipality in northern Italy (comune) with 6516 inhabitants (as of 31 December 2015) in the province of Monza and Brianza in Lombardy. The municipality is located about 16 kilometers northwest of Monza and about 20 kilometers northwest of Milan west of the Lambro at Parco delle Groane. Ceriano Laghetto is directly adjacent to the metropolitan city of Milan and the province of Varese.