| William C. Davis | |
| Birth Date: | 21 July 1938 |
| Birth Place: | Youngstown, Ohio, U.S. |
| Death Place: | Estero, Florida, U.S. |
| Player Years1: | c. 1959 |
| Player Team1: | Mount Union |
| Player Positions: | Quarterback, defensive back |
| Coach Years1: | 1964–1966 |
| Coach Team1: | Austintown Fitch HS (OH) |
| Coach Years2: | 1967 |
| Coach Team2: | Westminster (PA) (assistant) |
| Coach Years3: | 1968–1972 |
| Coach Team3: | Adrian |
| Coach Years4: | 1973–1975 |
| Coach Team4: | Michigan State (off. backs) |
| Coach Years5: | 1976–1978 |
| Coach Team5: | Philadelphia Eagles (TE) |
| Admin Years1: | 1979–1981 |
| Admin Team1: | Miami Dolphins (dir. pro pers.) |
| Admin Years2: | 1981–1986 |
| Admin Team2: | Cleveland Browns (VP player pers.) |
| Admin Years3: | 1986–1990 |
| Admin Team3: | Philadelphia Eagles (VP player pers.) |
| Overall Record: | 20–24 (college) 18–8–1 (high school) |
| Championships: | 3 MIAA (1970–1972) |
William C. Davis Sr. (July 21, 1938 – January 18, 2020) was an American football player, coach, and executive. He served as the head football coach at Adrian College in Adrian, Michigan for five seasons, from 1968 to 1972, compiling a record of 20–24.[1] He was later director of pro personnel for the National Football League (NFL) Miami Dolphins, vice president of player personnel for the Cleveland Browns,[2] and vice president of player personnel for the Philadelphia Eagles. On January 18, 2020, Davis died at the age of 81 from Alzheimer's disease.[3]
Davis' son, Billy, is an assistant coach for the Arizona Cardinals of the NFL.