| Mick Dennehy | |
| Birth Date: | June 13, 1950 |
| Birth Place: | Butte, Montana, U.S. |
| Player Years1: | 1971–1972 |
| Player Team1: | Montana |
| Player Positions: | Safety |
| Coach Years1: | 1975–1978 |
| Coach Team1: | Colton HS (WA) |
| Coach Years2: | 1979–1981 |
| Coach Team2: | Helena HS (MT) |
| Coach Years3: | 1980–1981 |
| Coach Team3: | Montana State (assistant) |
| Coach Years4: | 1982–1987 |
| Coach Years5: | 1988–1990 |
| Coach Team5: | Montana Western |
| Coach Years6: | 1991–1995 |
| Coach Team6: | Montana (OC) |
| Coach Years7: | 1996–1999 |
| Coach Team7: | Montana |
| Coach Years8: | 2000–2004 |
| Coach Team8: | Utah State |
| Admin Years1: | 2006–2007 |
| Admin Team1: | Boulder Jefferson HS (MT) |
| Overall Record: | 68–62 (college) |
| Tournament Record: | 3–4 (NCAA D-I-AA playoffs) |
| Championships: | 3 Big Sky (1996, 1998–1999) |
Michael Dennehy (born June 13, 1950) is a former American football player and coach. He served as the head football coach at the University of Montana Western (1988–1990), the University of Montana (1996–1999), and Utah State University (2000–2004), compiling a career college football record of 68–62.
As a safety on the Grizzlies' football team from 1971 to 1972, Dennehy earned first-team all-Big Sky Conference honors in 1972. He is tied for second in single-season Big Sky history with 10 interceptions in 1972, while leading the league that year, as well. Dennehy is tied for ninth in league history with 16 career interceptions.[1]
Dennehy started his college coaching career as an assistant coach for Montana State before switching to coach at high school level for a number of years. He returned to college football coaching at the University of Montana Western, a small NAIA school, before moving on to become the offensive coordinator at the University of Montana. In 1996, he was promoted to head coach of the Montana Grizzlies, but left following the 1999 season to take at post as the head coach of Utah State, replacing Dave Arslanian.[2] In 2005 Dennehy was fired as head coach of Utah State after compiling a record of 19–37.
Dennehy became athletics director at Jefferson High School in Boulder, Montana in 2006.[3] [4] Dennehy resigned after the 2006–07 school year.[5]