Garlasco is a comune in the Province of Pavia in the Italian region Lombardy, located about 35 kilometres southwest of Milan and about 20 kilometres west of Pavia. As of 31 December 2004, it had a population of 9,343 and an area of 39.0 square kilometres. The municipality of Garlasco contains the frazione Bozzola. Garlasco borders the following municipalities: Alagna, Borgo San Siro, Dorno, Gropello Cairoli, Tromello, Zerbolò.