Percy O. Clapp (March 10, 1900 – July 2, 1960) was an American college football player and coach. He served as the head football coach at Milwaukee State Teachers College—renamed from Milwaukee Normal School in 1927 and now known as the University of Wisconsin–Milwaukee—from 1925 to 1930 and at Lawrence College—now known as Lawrence University—in Appleton, Wisconsin from 1931 to 1934.[1] Clapp was an assistant coach coach for two years at the University of Idaho under head coach Ted Bank.[2]