Original Adidas football shirt Manchester United 2017/18

The 2017–18 season was Manchester United's 26th season in the Premier League and their 43rd consecutive season in the top flight of English football. The season was the first since 2003–04 without former club captain Wayne Rooney, who rejoined Everton after 13 seasons with United, during which time he overtook Bobby Charlton as their all-time top scorer. United also returned to the Champions League after a single season's absence, having won the 2016–17 UEFA Europa League.

United achieved their highest points total and league placing since the retirement of Sir Alex Ferguson in 2013, amassing 81 points to finish second in the Premier League. However, despite winning three cups the previous season, the club failed to secure silverware this time around, also finishing as runners-up in both the UEFA Super Cup and FA Cup. United also suffered disappointing exits in both the EFL Cup and Champions League, bowing out to Bristol City and Sevilla respectively by 2–1 scorelines. Throughout the season, despite having a wealth of attacking options and completing the signing of Alexis Sánchez in January, manager José Mourinho was criticised by sections of the media and a section of United supporters for a perceived negative playing style.