| John Harmon | |
| Birth Date: | 20 May 1895 |
| Birth Place: | Bible Grove, Illinois, U.S. |
| Death Place: | Ottawa, Kansas, U.S. |
| Alma Mater: | Missouri Wesleyan College[1] |
| Player Sport1: | Football |
| Player Team2: | Missouri Wesleyan |
| Coach Sport1: | Football |
| Coach Years2: | 1921–1922 |
| Coach Team2: | Central Wesleyan |
| Coach Years3: | 1923–1929 |
| Coach Team3: | Evansville |
| Coach Years4: | 1933 |
| Coach Team4: | Boston University |
| Coach Sport5: | Basketball |
| Coach Years6: | 1921–1923 |
| Coach Team6: | Central Wesleyan |
| Coach Years7: | 1923–1930 |
| Coach Team7: | Evansville |
| Coach Years8: | 1932–1935 |
| Coach Team8: | Boston University |
| Coach Sport9: | Baseball |
| Coach Years10: | 1924–1927 |
| Coach Team10: | Evansville |
| Coach Years11: | 1933–1935 |
| Coach Team11: | Boston University |
| Admin Years1: | 1921–1923 |
| Admin Team1: | Central Wesleyan |
| Admin Years2: | 1923–1930 |
| Admin Team2: | Evansville |
| Admin Years3: | 1935–1951 |
| Admin Team3: | Boston University |
| Overall Record: | 20–47 (football) 74–78 (basketball, excluding Central Wesleyan) 27–52 (baseball) |
John Millard Harmon (May 20, 1895 – October 18, 1974) was an American football, basketball, and baseball coach and college athletics administrator. He served as the head football coach at Central Wesleyan College in Warrenton, Missouri from 1921 to 1922, the University of Evansville in Evansville, Indiana from 1923 to 1929, and Boston University in 1933. Harmon was also the head basketball coach at Central Wesleyan from 1921 to 1923, Evansville from 1923 to 1930, and Boston University from 1932 to 1935. He was the head baseball coach at Evansville from 1924 to 1927 and at Boston University from 1933 to 1935. He also served as the athletic director at Boston University from 1935 to 1951.[2]
Harmon retired 1959 and moved to Ottawa, Kansas in 1960. He died on October 18, 1974, at Cedarhouse Nursing Home in Ottawa.[3]