Naser al-Din Shah Qajar (16 July 1831 – 1 May 1896) was the Shah of Qajar Iran from 5 September 1848 to 1 May 1896 when he was assassinated. He was the son of Mohammad Shah Qajar and Malek Jahān Khānom and the third longest reigning monarch in Iranian history after Shapur II of the Sassanid dynasty and Tahmasp I of the Safavid Dynasty.