Sesto San Giovanni[ˈsɛsto san dʒoˈvanni] (Lombard:Sest San Giovann) is a comune in the Metropolitan City of Milan, Lombardy, northern Italy. Its railway station is the northernmost stop on the Milan Metro M1 line. The city, informally referred to as "Sesto", has the honorary title of city, despite being a de facto suburb of Milan.