| J. Elwood Davis | |
| Birth Date: | 18 September 1892 |
| Birth Place: | Correctionville, Iowa, U.S. |
| Death Place: | Iowa City, Iowa, U.S. |
| Player Sport1: | Football |
| Player Years2: | 1915–1917 |
| Player Team2: | Iowa |
| Player Positions: | Halfback |
| Coach Sport1: | Football |
| Coach Years2: | 1920 |
| Coach Team2: | Kansas Wesleyan |
| Coach Years3: | c. 1929 |
| Coach Team3: | Washington University (backfield) |
| Coach Years4: | c. 1937 |
| Coach Team4: | Iowa (assistant) |
| Coach Sport5: | Baseball |
| Coach Years6: | 1943–1945 |
| Coach Team6: | Iowa |
| Overall Record: | 0–1–2 (college football) 15–15 (college baseball) |
John Elwood "Waddy" Davis (September 18, 1892 – January 9, 1974) was an American football player and coach of football and baseball.
Davis graduated from the University of Iowa in Iowa City.[1] He played football for the Iowa Hawkeyes and was captain of the football team.[2]
Davis coached in the high school ranks in Iowa from 1917 to 1919.[3]
Davis was the eighth head football coach at Kansas Wesleyan University in Salina, Kansas, serving for one season, in 1920 and compiling a record of 0–1–2.[4]
David died on January 9, 1974, at a hospital in Iowa City, Iowa.[5]