Aleksandr Iosifovich Neusykhin (; 19 January 1898 â 22 October 1969) was a Soviet historian and medievalist, Doctor of Sciences in Historical Sciences (1946), Professor at the Lomonosov Moscow State University. He headed the department of history at the Tomsk State Pedagogical University.
Neusykhin graduated from Moscow State University (MSU) in 1921. He was a student of Dmitry Petrushevsky. Neusykhin published his first article in 1922.
In 1938, he received the title of Professor. In 1946, he defended his doctoral dissertation.
From 1942 to 1943, Neusykhin headed the Department of History of the Middle Ages at the MSU.
His student was Aron Gurevich.