Lev Abramovich Tumarkin (Russian: Лев Абра́мович Тума́ркин; 14 January 1904 – 1 August 1974) was a Soviet mathematician who made significant contributions to topology, particularly in dimension theory.

He graduated from Moscow State University in 1925 and completed his postgraduate studies there in 1929 under the supervision of Pavel Alexandrov.

He spent his entire academic career at Moscow State University, where he became a professor in 1932 and earned his doctorate in physical and mathematical sciences in 1936.

[2][3] Tumarkin began his research career early, making notable contributions to topology while still an undergraduate.

[9][10] Soviet mathematicians Pavel Alexandrov and Andrey Kolmogorov described his teaching as "the fruit of many years of creative work and finished with filigree thoroughness.