List of Buffalo Bills seasons

The Buffalo Bills are a professional American football team based in the Buffalo–Niagara Falls metropolitan area. The Bills compete in the National Football League (NFL) as a member of the American Football Conference (AFC) East Division. Founded in 1959 by Ralph Wilson, they were a charter member of the American Football League (AFL) and joined the NFL in 1970 following the AFL–NFL merger. The Bills' name is derived from an All-America Football Conference franchise from Buffalo that was in turn named after western frontiersman Buffalo Bill. Since 1973 they have played their home games at Highmark Stadium in Orchard Park, New York.

In their time in the AFL from 1960 to 1969, the Bills reached the AFL Championship three consecutive times from 1964 to 1966, winning twice in 1964 and 1965. They did not return to the postseason until 1974 nor win a division title until 1980.

In the 1990 season, they won the AFC Championship to reach their first Super Bowl. They lost in Super Bowl XXV. They reached the next three Super Bowls with victories in the AFC Championship. They became the first team (and as of 2025, only team) to reach the Super Bowl four straight times. The Bills have won the AFC East five consecutive times, starting in 2020.

As of the end of the 2024 season, the Bills have an all-time record of 486 wins, 505 losses, and 8 ties in the regular season, with an additional 21 wins and 22 losses in the playoffs. The team has had 29 winning seasons, 32 losing seasons, and 4 having as many wins as losses.