Ali Khan Mansur (Persian: علی خان منصور, also known as Mansur ul-Mulk (منصورالملک)‎; 1886 – 8 December 1974) was the prime minister of Iran for two terms between 1940 and 1941 and in 1950.

Born in Tehran, he served as Governor of Khorasan and Azarbaijan provinces, and was an ambassador to Italy, The Vatican, and Turkey.

[citation needed] He resigned as Prime Minister several days after 25 August 1941, when British and Soviet troops invaded Iran to suppress German activity.

[1] After World War II, Mansur was appointed governor general of Azerbaijan in 1946 and was appointed ambassador to Turkey in 1953.

[1] His son, Hassan Ali Mansur, served as prime minister from 1964 to 1965.