William Simon

William Simon or Bill Simon may refer to:


 * William E. Simon (1927–2000), United States Secretary of the Treasury (1974–1977)
 * William H. Simon, Columbia Law School professor
 * William S. Simon (born 1960), president and CEO of Walmart U.S. (2010–2014)
 * William Simon (sociologist) (1920–2000), American educator
 * Bill Simon (politician) (William Edward Simon, Jr.; born 1951), American businessman and politician
 * Bill Simon (musician) (William L. Simon; 1920–2000), American jazz musician
 * Glyn Simon (William Glyn Hughes Simon; 1903–1972), Archbishop of Wales