2020–21 Royal Excel Mouscron season

The 2020–21 Royal Excel Mouscron season was the club's 99th season in existence and its seventh consecutive season in the top flight of Belgian football. In addition to the domestic league, Excel Mouscron participated in this season's edition of the Belgian Cup. The season covered the period from 1 July 2020 to 30 June 2021.

Matches
The league fixtures were announced on 8 July 2020.