Hasan Ali Mansur (Persian: حسن علی منصور‎; 13 April 1923 – 26 January 1965) was an Iranian politician who served as Prime Minister from 1964 to 1965.

During the World War II era, he entered Law School at the University of Tehran and graduated with a degree in political science.

The Progressive Party or "Kanoon Motaraghion" was founded by Mansour to conduct economic policy research as well as the launching pad for his future prime ministership.

After Alam resigned his premiership in 1964, Mohammad Reza Pahlavi appointed Mansur prime minister and his cabinet was announced on 7 March.

[3] He introduced many young new faces, such as Amir Abbas Hoveyda, Jamshid Amuzegar, Ataollah Khosravani, Nahavandi, Alinaghi Alikhani, Manouchehr Rohani, and many other Iran Novin members.

During the crisis, the Shah quickly appointed Mansur's friend, Amir-Abbas Hoveyda as the acting prime minister, in which role he continued for the next thirteen years.

Mansour was buried in Shah-Abdol-Azim near Reza Shah's mausoleum, and a Kennedy-like Black Granite Eternal Flame was constructed at his grave site.