Walter Daniel Powell (July 15, 1891 – September 15, 1967) was an American football player and coach of football, basketball, and baseball. Powell was born in Reedsburg, Wisconsin. He played college football at the University of Wisconsin from 1912 to 1913. He coached several sports at Western Reserve University from 1914 to 1917, amassing an overall 14–15 record in football, 18–24 record in basketball, and a 5–3 record in baseball. In 1917, Powell served as athletic director at Camp Sherman. From 1917 to 1919, he served as head coach of the Naval Training Station in Charleston, South Carolina.