The 1991 All-Big Ten Conference football team consists of American football players chosen as All-Big Ten Conference players for the 1991 college football season. The only organization that has been found to have selected an All-Big Ten team in 1991 was the Associated Press (AP), based on voting by the media.

Elvis M. Grbac is an American former football quarterback who played in the National Football League (NFL) for nine seasons, most notably with the Kansas City Chiefs. He played college football for the Michigan Wolverines, winning the Sammy Baugh Trophy, and was selected by the San Francisco 49ers in the eighth round of the 1993 NFL Draft. Grbac spent his first four seasons as a backup with the 49ers before playing his next four seasons as the Chiefs' starter.