| Club: | Real Oviedo |
| Season: | 2020–21 |
| Ownertitle: | Owner |
| Owner: | Grupo Carso |
| Chrtitle: | President |
| Chairman: | Jorge Menéndez Vallina |
| Mgrtitle: | Head coach |
| Manager: | José Ángel Ziganda |
| Stadium: | Carlos Tartiere |
| League: | Segunda División |
| League Result: | 13th |
| Cup1: | Copa del Rey |
| Cup1 Result: | Second round |
| League Topscorer: | Gustavo Blanco (7) |
| Season Topscorer: | Gustavo Blanco (7) |
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| Pattern B1: | _oviedo2021h |
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| Pattern So1: | _oviedo2021h |
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| Prevseason: | 2019–20 |
| Nextseason: | 2021–22 |
The 2020–21 Real Oviedo season was the club's 95th season in existence and the club's sixth consecutive season in the second division of Spanish football. In addition to the domestic league, Real Oviedo participated in this season's edition of the Copa del Rey. The season covered the period from 21 July 2020 to 30 June 2021.
| scope=col | Player | Transferred from | scope=col; style="width: 65px;" | Fee | scope=col | Date | scope=col | Source | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 25 | Dinamo București | Undisclosed | [1] |
| scope=col | Player | Transferred to | scope=col; style="width: 65px;" | Fee | scope=col | Date | scope=col | Source | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 23 |  Mallorca | Loan return | End of season | [2] |
See main article: 2020–21 Segunda División.
The league fixtures were announced on 31 August 2020.[3] [4]
See main article: 2020–21 Copa del Rey.