Robert W. Ash (born July 9, 1951) is an American former college football coach. He served as the head football coach at Juniata College in Huntingdon, Pennsylvania from 1980 to 1988, Drake University in Des Moines, Iowa from 1989 to 2006, and Montana State University in Bozeman, Montana from 2007 to 2015, compiling a career college football coaching record of 246–137–5. His record was 75–51–4 at the NCAA Division III level and 171–86–1 at the NCAA Division I-AA/FCS level.