The 2021–22 Sutton United F.C. season was the 95th edition of competitive association football and first season in the English Football League played by Sutton United Football Club, a professional football club based in Sutton in the London Borough of Sutton, England. They won, and were therefore promoted from, the National League in 2020–21 to earn entry into the EFL League Two. The club contested in this season's edition of the FA Cup; and for the first time, in the EFL Cup and EFL Trophy. The season ran from 1 July 2021 to 30 June 2022.