Olgiate Comasco (Comasco: Olgiaa [ulˈdʒaː]) is a comune (municipality) in the Province of Como in the Italian region Lombardy, located about 40 kilometres (25 mi) northwest of Milan and about 10 kilometres (6 mi) southwest of Como. It received the honorary title of city with a presidential decree in 1998.
Olgiate borders the following municipalities: Albiolo, Beregazzo con Figliaro, Colverde, Faloppio, Lurate Caccivio, Oltrona di San Mamette, Solbiate, Somaino