The Polisario Front, Frente Polisario, FRELISARIO or simply POLISARIO, from the Spanish abbreviation of Frente Popular de Liberación de Saguía el Hamra y Río de Oro ("Popular Front for the Liberation of Saguia el-Hamra and Río de Oro" Arabic: الجبهة الشعبية لتحرير ساقية الحمراء و وادي الذهب Al-Jabhat Al-Sha'abiyah Li-Tahrir Saqiya Al-Hamra'a wa Wadi Al-Dhahab), is a Sahrawi rebel national liberation movement aiming to end Moroccan presence in the Western Sahara. It is an observer member of the Socialist International.
The Polisario Front is outlawed in the parts of Western Sahara under Moroccan control, and it is illegal to raise its party flag (often called the Sahrawi flag) there.
After attempting in vain to gain backing from several Arab governments, including both Algeria and Morocco, but only drawing faint notices of support from Libya and Mauritania, the movement eventually relocated to Spanish-controlled Western Sahara to start an armed rebellion.