Ron Ernst (born October 5, 1957) is a former American football coach. He served as the head football coach at Ripon College in Ripon, Wisconsin from 1991 to 2022, compiling a record of 193–114. Ernst won his 100th game during the 2006 season and won more games than any other coach in program history. Ernst also served as Ripon's head men's golf coach, associate professor in the Department of Exercise Science and assistant athletic director.