2020–21 CD Leganés season

The 2020–21 CD Leganés season was the club's 92nd season in existence and the first season back in the second division of Spanish football. In addition to the domestic league, Leganés participated in this season's edition of the Copa del Rey. The season covered the period from 20 July 2020 to 30 June 2021.

Matches
The league fixtures were announced on 31 August 2020.