Mat Mendenhall

{{Infobox NFL biography }}
 * name               = Mat Mendenhall
 * number             = 76
 * position           = Defensive end
 * birth_date         = {born May, 14, 1957 (age66)
 * birth_place        = Salt Lake City, Utah, U.S.
 * height_ft          = 6
 * height_in          = 6
 * weight_lb          = 254
 * high_school        = Salt Lake City (UT) East
 * college            = BYU
 * draftyear          = 1980
 * draftround         = 2
 * draftpick          = 55
 * pastteams          =
 * Washington Redskins ({{NFL Year|1981}}–{{NFL Year|1982}})
 * highlights=
 * Super Bowl champion (XVII)
 * statlabel1         = Sacks
 * statvalue1         = 2.0
 * statlabel2         = Fumble recoveries
 * statvalue2         = 2
 * pfr                = MendMa20

Matthew W. Mendenhall (born May 14, 1957) is an American former professional football player who was a defensive end for two seasons in the National Football League (NFL) for the Washington Redskins before numerous injuries and alcoholism ended his career. He started in Super Bowl XVII as his Redskins defeated the Miami Dolphins for the NFL Championship in 1982.

He played college football for the BYU Cougars after attending East High School. He is the older brother of current New Mexico Lobos and former BYU Cougars/Virginia Cavaliers head coach Bronco Mendenhall.