Spanish Sahara, officially the Spanish Possessions in the Sahara from 1884 to 1958, then Province of the Sahara between 1958 and 1976, was the name used for the modern territory of Western Sahara when it was occupied and ruled by Spain between 1884 and 1976. It had been one of the most recent acquisitions, as well as one of the last remaining holdings, of the Spanish Empire, which had once extended from the Americas to the Spanish East Indies.

The Polisario Front, Frente Polisario, Frelisario or simply Polisario, is a rebel Sahrawi nationalist liberation movement claiming Western Sahara.