Sir Leon Radzinowicz (August 15, 1906 – December 29, 1999) was an academic criminologist and the founding director of the Institute of Criminology at the University of Cambridge.
He was born in Łódź, Poland and arrived in Cambridge in the late 1930s. During World War II he established the Department of Criminal Science in the Faculty of Law, and in 1959 he became the first Wolfson Professor of Criminology. He was knighted in 1970.