Rosia

Rosia may refer to:


 * Rosia, the Greek name for Rus' (region)
 * Rosia, Sovicille, a village in Tuscany, Italy
 * Roșia (disambiguation), villages in Romania
 * Roșia Montană, a commune in Romania
 * Roșia, a tributary of the river Dorna in Romania
 * Rosia Airfield, a World War II military airfield
 * Rosia Bay, the only natural harbour in Gibraltar