| Upright: | 0.7 |
| Country: | Spain |
| First: | 2021–22 |
| Organiser: | RFEF |
| Teams: | 5 groups of 18 teams each (90) |
| Promotion: | Primera Federación |
| Relegation: | Tercera Federación |
| Levels: | 4 |
| Divisions: | 5 |
| Domest Cup: | Copa del Rey Copa Federación |
| Confed Cup: | UEFA Europa League (via winning Copa del Rey) |
| Tv: | Footters, TVG2, ETB 4, 7RM, IB3, CMM, Aragón TV, PTV Córdoba |
| Current: | 2024–25 Segunda Federación |
Segunda Federación, previously called Segunda RFEF, also officially known as Segunda B,[1] 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.
On 6 May 2020, the RFEF announced the creation of a new, two-group, 40-team third division called Primera División RFEF, which resulted in the former third division, Segunda División B, dropping down a level and becoming Segunda División RFEF; the changes were made effective for the 2021–22 campaign.[2] [3]
In July 2022, the division was renamed Segunda Federación.[4]
Segunda Federación features 90 teams divided into 5 groups of 18. The champions of each group achieve automatic promotion to Primera Federación, while the other top four teams qualify for a play-off round, where five of the 20 teams qualified also achieve promotion. However reserve teams are only eligible for promotion to the Primera Federación if their senior team is in one division above it. The bottom five teams in each group are relegated to the Tercera Federación. Also, the four worst 13th-placed teams enter into relegation play-offs to determine the two teams to be relegated.
Each team of Segunda Federación can have 22 players in their roster, with these two limitations:
The member clubs of the Segunda Federación for the 2024–25 season are listed below.
| Season | Group winners | Other promoted teams | ||||
|---|---|---|---|---|---|---|
| Group I | Group II | Group III | Group IV | Group V | ||
| 2021–22 | Pontevedra | Osasuna B | Numancia | Córdoba | Intercity | Ceuta, Eldense, La Nucía, Mérida, Murcia |
| 2022–23 | Arenteiro | Sestao River | Teruel | Antequera | Melilla | Atlético Madrid B, Atlético Sanluqueño, Recreativo Granada, Recreativo Huelva, Tarazona |
| 2023–24 | Ourense | Bilbao Athletic | Hércules | Sevilla Atlético | Gimnástica Segoviana | Barakaldo, Betis Deportivo, Marbella, Yeclano, Zamora |
Goals in playoffs are not counted.
| Season | Top scorer | Club | Goals | |
|---|---|---|---|---|
| 2021–22 |  Charles | Pontevedra | 19 | |
| 2022–23 |  Carlos Martín | Atlético Madrid B | 18 | |
| 2023–24 | Urko Izeta | Bilbao Athletic | 22 |