Ossona (Milanese: ) is a comune (municipality) in the Metropolitan City of Milan in the Italian region Lombardy, located about west of Milan. As of 31 December 2004, it had a population of 3,928 and an area of .
The municipality of Ossona contains the frazione (subdivision) Asmonte.
Ossona borders the following municipalities: Casorezzo, Inveruno, Arluno, Mesero, Marcallo con Casone, Santo Stefano Ticino.