The 1991 Detroit Lions season was the franchise's 62nd season in the National Football League, their 58th as the Detroit Lions. It stands as the team's best season since the NFL-AFL merger in 1970. The team finished 12-4, won the NFC Central Division, and appeared in the playoffs for the first time since 1983; it also marked the team's first winning season since 1983. The Lions finished the season undefeated in the Pontiac Silverdome, including playoffs, and the team did not lose a game at an indoor facility the entire season, having made trips to Indianapolis and Minnesota during the year.