| Jeff Geiser | |
| Birth Date: | 25 February 1953 |
| Player Years1: | 1972–1974 |
| Player Team1: | Colorado |
| Player Positions: | Linebacker |
| Coach Years1: | 1984–1996 |
| Coach Team1: | Adams State |
| Admin Years1: | ? |
| Admin Team1: | Adams State |
| Admin Years2: | 2009–2016 |
| Admin Team2: | Eastern New Mexico |
| Overall Record: | 65–68–2 |
| Tournament Record: | 3–2 (NAIA D-I playoffs) |
| Championships: | 1 RMAC (1989) |
| Awards: | NAIA Division I Coach of the Year (1989) |
Jeff Geiser (born February 25, 1953) is a former American football coach and college athletics administrator. He served as the head football coach at Adams State College—now known as Adams State University—in Alamosa, Colorado for 13 seasons, from 1984 to 1996, compiling a record of 65–68–2.[1] Geiser played college football as a linebacker at the University of Colorado Boulder from 1972 to 1974. He coached at Grand Junction High School in Grand Junction, Colorado and Mesa State College—now known as Colorado Mesa University—before being hired as head football coach at Adams State.
A native of La Veta, Colorado, Geiser worked as a sporting goods salesman before returning to college sports as the athletic director at Eastern New Mexico University in 2009.[2]