The 2021–22 season was the 98th season in the existence of Rayo Vallecano and the club's first season back in the top flight of Spanish football. In addition to the domestic league, Rayo Vallecano 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.
Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.
Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply. Players may hold more than one non-FIFA nationality.
Source: LaLiga Santander Rules for classification: 1) Points; 2) Head-to-head points; 3) Head-to-head goal difference; 4) Goal difference; 5) Goals scored; 6) Fair-play points (Note: Head-to-head record is used only after all the matches between the teams in question have been played)[8] Notes: