Osio

Osio may refer to;


 * Osio, Italian noble family who rose to prominence in Lombardy in the 12th century
 * Felice Osio (1587–1631), Italian scholar
 * Marco Osio (born 1966), Italian footballer
 * Antonio Maria Osio (1800–1878), founder of the Mexican landgrant Rancho Punta de los Reyes Sobrante in Marin County, California, USA
 * Osio Sopra, a town in Italy
 * Osio Sotto, a town in Italy