Lev Ivanovich Medved (Russian: Лев Иванович Медведь, Ukrainian: Левко Іванович Медведь; 18 June 1905 – 22 February 1982) was a Soviet medical worker. He is the founder and former head of the Institute of Ecohygiene and Toxicology. He was a professor of the USSR Academy of Medical Sciences, and Honored Scientist of the Ukrainian SSR (1961).