Diane Grob Schmidt (born November 1945) is an American chemist, who was the Executive at Procter & Gamble Co. in Cincinnati, Ohio from 1981 to 2014. In 2015, she served as president of the American Chemical Society (ACS). As of 2022, she was serving as the Chair of the Board of Visitors for the Department of Chemistry at the University of Tennessee, Knoxville.