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