Leon Green (March 31, 1888 – June 15, 1979) was an American legal realist and long-tenured dean of Northwestern University School of Law (1929–1947). He also served as professor at Yale Law School (1926–1929) and the University of Texas School of Law (1915–1918, 1920–1926, and 1947–1977). Born in , Louisiana, Green earned an A.B. from Ouachita College in 1908 and LL.B from the University of Texas in 1915. A leading expert in the field of Tort law, Green authored the groundbreaking treatise, The Rationale of Proximate Cause (1927). Dean Green died in Austin, Texas, on June 15, 1979.