Cosio

Cosio may refer to:


 * Cosio di Arroscia, an Italian municipality in the Province of Imperia, Liguria
 * Cosio Valtellino, an Italian municipality in the Province of Sondrio, Lombardy
 * Cosío, a Mexican municipality in the state of Aguascalientes
 * Cosío, a Mexican town and municipal seat in the state of Aguascalientes
 * José Gabriel Cosio, a Peruvian scholar