Willard N. Greim (August 7, 1890 in Johnson County, Missouri – June 27, 1982 in Poway, California) was an American basketball administrator and coach. He coached the University of Central Missouri basketball team in 1919–1923. Beginning in 1932, he served in several positions with the Amateur Athletic Union, including a period as a president of the AAU (1944–1947). He led the Joint Basketball Rules Committee that adopted a unified standard of basketball rules in the US in 1947. He served as a president of the FIBA from 1948 to 1960. In 2007, he was enshrined as a contributor in the FIBA Hall of Fame.