| John Konstantinos | |
| Birth Date: | 13 August 1936 |
| Birth Place: | Yorkville, Ohio, U.S. |
| Death Place: | Copley, Ohio, U.S. |
| Player Years1: | c. 1955 |
| Player Team1: | Morris Harvey |
| Player Years2: | 1957 |
| Player Team2: | Kent State |
| Coach Years1: | 1967–1968 |
| Coach Team1: | Temple (assistant) |
| Coach Years2: | 1969–1971 |
| Coach Team2: | William & Mary (assistant) |
| Coach Years3: | 1972–1974 |
| Coach Team3: | NC State (ends/head recruiter) |
| Coach Years4: | 1975–1977 |
| Coach Team4: | Eastern Illinois |
| Coach Years5: | 1979–1980 |
| Coach Team5: | Arkansas (assistant) |
| Admin Years1: | 1990–2002 |
| Admin Team1: | Cleveland State |
| Overall Record: | 9–21–2 |
John Konstantinos (August 13, 1936 – March 14, 2013) was an American football player, coach, and college athletics administrator. He served as the head football coach at Eastern Illinois University from 1975 to 1977, compiling a record of 9–21–2. Konstantinos was the athletic director at Cleveland State University from 1990 to 2002. Konstantinos was born on August 13, 1936, in Yorkville, Ohio. He died on March 14, 2013, in Copley, Ohio.[1] [2]