Nasr (1 November 1287 – 16 November 1322), full name Abu al-Juyush Nasr ibn Muhammad (Arabic: أبو الجيوش نصر بن محمد), was the fourth Nasrid ruler of the Emirate of Granada from 14 March 1309 until his abdication on 8 February 1314. He was the son of Muhammad II al-Faqih and Shams al-Duha. He ascended the throne after his brother Muhammad III was dethroned in a palace revolution. At the time of his accession, Granada faced a three-front war against Castile, Aragon and the Marinid Sultanate, triggered by his predecessor's foreign policy. He made peace with the Marinids in September 1309, ceding to them the African port of Ceuta, which had already been captured, as well as Algeciras and Ronda in Europe. Granada lost Gibraltar to a Castilian siege in September, but successfully defended Algeciras until it was given to the Marinids, who continued its defense until the siege was abandoned in January 1310. James II of Aragon sued for peace after Granadan defenders defeated the Aragonese siege of Almería in December 1309, withdrawing his forces and leaving the Emirate's territories by January. In the ensuing treaty, Nasr agreed to pay tributes and indemnities to Ferdinand IV of Castile and yield some border towns in exchange for seven years of peace.

Despite achieving peace with relatively minimal losses, Nasr was unpopular at court as he was suspected of being pro-Christian and accused of devoting so much time to astronomy that he neglected his duties as ruler. A rebellion started by his brother-in-law Abu Said Faraj in 1311 was initially repulsed, but a second campaign by Abu Said's son Ismail ended in the capture of the Alhambra palace and Nasr's abdication on 8 February 1314 in favour of Ismail, now Ismail I. He was allowed to rule the eastern province of Guadix, styling himself "King of Guadix", and attempted to regain the throne with help from Castile. Ismail defeated the Castilian forces in the Battle of the Vega of Granada, resulting in a truce that ended their support for Nasr. Nasr died without an heir in 1322.