| Stafford Cassell | |
| Birth Date: | 8 February 1909 |
| Birth Place: | Asberry, Virginia, U.S. |
| Death Place: | Washington, D.C., U.S. |
| Player Sport1: | Football |
| Player Years2: | c. 1935 |
| Player Team2: | American |
| Player Sport3: | Basketball |
| Player Years4: | c. 1935 |
| Player Team4: | American |
| Player Positions: | Quarterback (football) |
| Coach Sport1: | Football |
| Coach Years2: | 1940–1941 |
| Coach Team2: | American |
| Coach Years3: | 1942 |
| Coach Team3: | Morningside |
| Coach Sport4: | Basketball |
| Coach Years5: | 1937–1942 |
| Coach Team5: | American |
| Coach Years6: | 1946–1952 |
| Coach Team6: | American |
| Admin Years1: | 1937–1939 |
| Admin Team1: | American (assistant AD) |
| Admin Years2: | 1939–1941 |
| Admin Team2: | American |
| Admin Years3: | 1942–? |
| Admin Team3: | Morningside |
| Overall Record: | 4–13–1 (football) 152–89 (basketball) |
Stafford Hendricks "Pop" Cassell (February 8, 1909 – April 16, 1966) was an American college football and college basketball coach.
Cassell was the head football coach at American University in Washington, D.C. from 1940 to 1941 and at the Morningside College in Sioux City, Iowa in 1942. His coaching record at Morningside was 2–6.[1] His coaching record at American was 2–7–1.
He was buried in Arlington National Cemetery.[2] In 1969, American University established the Stafford H. Cassell Hall of Fame in his honor.