Segunda Federación
| Organising body | RFEF |
|---|---|
| Founded | 6 May 2020 |
| First season | 2021–22 |
| Country | Spain |
| Divisions | 5 |
| Number of clubs | 5 groups of 18 teams each (90) |
| Level on pyramid | 4 |
| Promotion to | Primera Federación |
| Relegation to | Tercera Federación |
| Domestic cup(s) | Copa del Rey Copa Federación |
| Broadcaster(s) | Footters, TVG2, ETB 4, 7RM, IB3, CMM, Aragón TV, PTV Córdoba |
| Website | rfef.es/segunda-federacion |
| Current: 2024–25 Segunda Federación | |
Segunda Federación, previously called Segunda RFEF, also officially known as Segunda B, is the fourth tier of the Spanish football league system containing 90 teams divided into five groups. It is administered by the Royal Spanish Football Federation. It is the second tier outside the top two professional leagues, the Primera División (also known as La Liga) and Segunda División (also known as La Liga 2), being behind Primera Federación and above Tercera Federación. The division also includes the reserve teams of a number of La Liga and La Liga 2 teams.