| Club: | Rayo Vallecano |
| Season: | 2020–21 |
| Chrtitle: | President |
| Chairman: | Raúl Martín Presa |
| Mgrtitle: | Head coach |
| Manager: | Andoni Iraola |
| Stadium: | Campo de Fútbol de Vallecas |
| League: | Segunda División |
| League Result: | 6th (promoted via play-offs) |
| Cup1: | Play-offs |
| Cup1 Result: | Winners |
| Cup2: | Copa del Rey |
| Cup2 Result: | Round of 16 |
| League Topscorer: | Isi Palazón (9) |
| Season Topscorer: | Isi Palazón (10) |
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| Prevseason: | 2019–20 |
| Nextseason: | 2021–22 |
The 2020–21 Rayo Vallecano season was the club's 96th season in existence and the second consecutive season in the second division of Spanish football. In addition to the domestic league, Rayo Vallecano participated in this season's edition of the Copa del Rey. The season covered the period from 21 July 2020 to 30 June 2021.
See main article: Rayo Vallecano B.
See main article: 2020–21 Segunda División.
The league fixtures were announced on 31 August 2020.[1] [2]
See main article: 2020–21 Copa del Rey.
Last updated on 8 March 2021.
|-! colspan=14 style=background:#dcdcdc; text-align:center|Goalkeepers|-! colspan=14 style=background:#dcdcdc; text-align:center|Defenders|-! colspan=14 style=background:#dcdcdc; text-align:center|Midfielders|-! colspan=14 style=background:#dcdcdc; text-align:center|Forwards|-! colspan=14 style=background:#dcdcdc; text-align:center|Players who have made an appearance this season but have left the club|-|}