The 2018–19 season was Milton Keynes Dons' 15th season in their existence, and the club's first season back in League Two following relegation from League One at the end of the 2017–18 season. Along with competing in League Two, the club also competed in the FA Cup, EFL Cup and EFL Trophy. The season covers the period from 1 July 2018 to 30 June 2019.