Clemmer is a surname. Notable people with the surname include: Ann Clemmer (born 1958), American political scientist and politician David Clemmer, Canadian style expert David E. Clemmer (born 1965), American analytical chemist James Clemmer (died 1942), vaudeville and movie theater manager Mary C. Ames (born Mary Clemmer, 1831–1884), American author Richard L. Clemmer (born ), American business executive