The 2021–22 season was the 82nd season in the existence of SD Eibar and the club's first season back in the second division of Spanish football since 2014.

In addition to the domestic league, Eibar participated in this season's edition of the Copa del Rey.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Players may hold more than one non-FIFA nationality.

Win Draw Loss Source: Soccerway Source: La Liga SmartBank The league fixtures were announced on 30 June 2021.