William Robert Smaltz Sr. (March 17, 1918 – September 14, 2001) was an American college football player and coach. He served as the head football coach at Juniata College in Huntingdon, Pennsylvania from 1947 to 1953, compiling a 32–17–2 record including an undefeated season in 1953. As a collegiate athlete, he quarterbacked the Penn State Nittany Lions football squad for three seasons and earned a selection by the Philadelphia Eagles in the 1942 NFL Draft.
Smaltz played as a fullback on the 1943 Camp Edwards Yanks football team.