The Madrid Accords, formally the Declaration of Principles on Western Sahara, was a treaty between Spain, Morocco, and Mauritania setting out six principles which would end the Spanish presence in the territory of Spanish Sahara and arrange a temporary administration in the area pending a referendum.

The territory had been a Spanish province and former colony. The agreement was signed in Madrid on November 14, 1975, six days before Franco died, although it was never published on the Boletin Oficial del Estado. This agreement conflicted with the Law on decolonization of Sahara, ratified by the Spanish Parliament (Cortes) on November 18.

In cause of the Madrid agreement, the territory would then be divided between Morocco and Mauritania, with no role for either the Polisario Front or the Sahrawi people generally. Following the accords, the Polisario relocated from the Mauritanian border to Algeria.