This is a list of all seasons played by Cambridge United in English football since the 1970–71 season, when the club were elected to the Football League. It details their record in every major competition entered, as well as the top goalscorers for each season. The club currently play in League One, having been promoted from League Two in 2020/21 where they had competed since 2014, following their promotion back to the Football League after a 9-year absence, during which time they competed in the Football Conference.