Abu Kamil Nasr ibn Salih ibn Mirdas (died 22 May 1038), also known by his laqab (honorific epithet) of Shibl al-Dawla ("Lion cub of the Dynasty"), was the second Mirdasid emir of Aleppo, ruling between 1029/30 until his death. He was the eldest son of Salih ibn Mirdas, founder of the Mirdasid dynasty. Nasr fought alongside his father in the battle of al-Uqhuwanah, where Salih was killed by a Fatimid army. Afterward, Nasr ruled the emirate jointly with his brother Thimal. The young emirs soon faced a large scale Byzantine offensive led by Emperor Romanos III. Commanding a much smaller force of Bedouin horsemen, Nasr routed the Byzantines at the Battle of Azaz.

Following his victory, he ousted Thimal from Aleppo and entered into Byzantine vassalage, while attempting to maintain ties with the Fatimids. He nominally recognized Fatimid suzerainty in 1037 and was concurrently given control of Hims, which the Mirdasids lost several years prior. The Fatimid governor of Syria, Anushtakin al-Dizbari, whose forces killed Salih in 1029, objected to Nasr's acquisition of Hims; in 1038, his forces marched against Nasr and killed him during a battle in Hama's environs. Thimal succeeded Nasr, but Aleppo fell to al-Dizbari weeks later. Mirdasid rule was restored and continued with some interruption until 1080.

Nasr renovated the Aleppo Citadel and made it his seat of power. Under the direction of his local Christian vizier, Aleppo was expanded and urbanized to accommodate an influx of Muslims from the countryside. Nasr's rule was limited to the northern Syrian portion of the emirate, while the Mirdasids' Upper Mesopotamian fortresses were controlled by Thimal. Though relations with his Banu Kilab tribe were strained at times, Nasr secured strong ties with the Banu Numayr by marrying the Numayri princess al-Sayyida Alawiyya. With her, he had his only known son, Mahmud, who later ruled Aleppo.

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