| Jack Cosgrove | |
| Current Title: | Head coach |
| Current Team: | Colby |
| Current Conference: | NESCAC |
| Current Record: | 20–33 |
| Birth Date: | 30 October 1956 |
| Birth Place: | Sharon, Massachusetts, U.S. |
| Player Years1: | 1974–1977 |
| Player Team1: | Maine |
| Player Positions: | Quarterback |
| Coach Years1: | 1978–1980 |
| Coach Team1: | Maine (GA) |
| Coach Years2: | 1981–1984 |
| Coach Team2: | Stoughton HS (MA) |
| Coach Years3: | 1985–1986 |
| Coach Team3: | Boston College (OA) |
| Coach Years4: | 1987–1988 |
| Coach Team4: | Maine (QB/WR) |
| Coach Years5: | 1989–1992 |
| Coach Team5: | Maine (OC) |
| Coach Years6: | 1993–2015 |
| Coach Team6: | Maine |
| Coach Years7: | 2018–present |
| Coach Team7: | Colby |
| Overall Record: | 148–168 (college) |
| Tournament Record: | 3–5 (NCAA D-I-AA/D-I playoffs) |
| Championships: | 2 A-10 (2001–2002) 1 CAA (2013) |
| Awards: | 2× A-10 Coach of the Year (1996, 2001) |
Jack Cosgrove (born October 30, 1956) is an American college football coach. He is the head football coach for Colby College, a position he has held since 2018. Cosgrove served as the head football coach at the University of Maine from 1993 to 2015. He is an alumnus of Maine and played college football as a quarterback on the Maine Black Bears football team. Prior to receiving the head coaching position as his alma mater, Cosgrove served as an assistant at Maine and Boston College and was head coach at Stoughton High School.