William C. "Bill" Heiss, Jr. (born c. 1923) is a former American football player and coach of multiple sports. He served as the head football coach at Adams State College (1948–1949), St. Cloud State University (1950), Colorado College (1951–1953), and the University of Northern Colorado (1963–1965), compiling a career college football record of 40–34–5. Heiss was also the head basketball coach at Colorado College for one season in 1951–1952, tallying a mark of 2–14, and the head baseball coach at the University of Denver from 1955 to 1959, amassing a record of 70–61–1. His 1957 baseball team won the Skyline Conference championship. Heiss played college football at the University of Illinois at Urbana–Champaign in the mid-1940s.