| J. Quinn Decker | |
| Birth Date: | 29 October 1907 |
| Death Place: | Knoxville, Tennessee, U.S. |
| Player Sport1: | Football |
| Player Years2: | 1928–1930 |
| Player Team2: | Tennessee |
| Player Positions: | Fullback |
| Coach Sport1: | Football |
| Coach Years2: | 1932–1934 |
| Coach Team2: | Knox Country Central HS (TN) |
| Coach Years3: | 1935–1937 |
| Coach Team3: | Centre (backfield) |
| Coach Years4: | 1938–1941 |
| Coach Team4: | Centre |
| Coach Years5: | 1944–1945 |
| Coach Team5: | Third Air Force |
| Coach Years6: | 1946–1952 |
| Coach Team6: | The Citadel |
| Coach Sport7: | Basketball |
| Coach Years8: | 1936–1937 |
| Coach Team8: | Centre (freshmen) |
| Coach Years9: | 1937–1941 |
| Coach Team9: | Centre |
| Admin Years1: | 1946–1953 |
| Admin Team1: | The Citadel |
| Overall Record: | 52–61–4 (college football) |
| Championships: | Football 1 AAF League (1945) |
James Quinn Decker (October 29, 1907 – December 20, 1987)[1] was an American football player and coach. He served as the head football coach Centre College from 1938 to 1941 and The Citadel from 1946 to 1952, compiling a career college football coaching record of 37–56–3.
Decker played fullback at the University of Tennessee. He later became an assistant coach at the school.[2]
Before coaching in college, Decker coached football at the high school level[3] at Central High School in Knoxville, Tennessee.[4]
Decker was the head football coach at Centre College in Danville, Kentucky from 1938 until completion of the 1941 season.[5] [6]
Quinn was the 11th head football coach at The Citadel, The Military College of South Carolina, serving for seven seasons, from 1946 until 1952, and compiling a record of 23–39–1. He led the program in its re-establishment after World War II.[7]