| Club: | Rayo Vallecano |
| Season: | 2019–20 |
| Chrtitle: | President |
| Chairman: | Raúl Martín Presa |
| Mgrtitle: | Head coach |
| Manager: | Paco Jémez |
| Stadium: | Campo de Fútbol de Vallecas |
| League: | Segunda División |
| League Result: | 7th |
| Cup1: | Copa del Rey |
| Cup1 Result: | Round of 16 |
| League Topscorer: | Leonardo Ulloa (6) |
| Season Topscorer: | Leonardo Ulloa (6) |
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| Prevseason: | 2018–19 |
| Nextseason: | 2020–21 |
The 2019–20 season was Rayo Vallecano's 95th season in existence and the club's first season back 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 was slated to cover a period from 1 July 2019 to 30 June 2020. It was extended extraordinarily beyond 30 June due to the COVID-19 pandemic in Spain.
See main article: 2019–20 Segunda División.
The fixtures were revealed on 4 July 2019.[2]
See main article: 2019–20 Copa del Rey.