Tercera Federación
Tercera Federación, previously known as Tercera RFEF, is the fifth tier of the Spanish football league system. It is below the La Liga, Segunda División, and its fellow semi-professional divisions Primera Federación and Segunda Federación. It was founded in 1929 as the third tier, and dropped down to the fourth and fifth tiers in 1977 and 2021, respectively.
History
On 6 May 2020, the RFEF announced the creation of a new, two-group, 40-team third division called Primera División RFEF, which caused the former third and fourth divisions, Segunda División B and Tercera División, respectively, to drop down a level and change into Segunda División RFEF and Tercera División RFEF; the changes were made effective for the 2021–22 campaign.In July 2022, the division was renamed Tercera Federación.
Current format
The Tercera Federación features 18 regional groups, corresponding to the autonomous communities of Spain, where each group is administered by a regional football federation. At the end of the season the first four teams in each group qualify for promotion play-offs to decide which teams are promoted to Segunda Federación. At least the three teams finishing bottom of each group may be relegated to the Divisiones Regionales de Fútbol. However the number of teams relegated can vary. The eighteen group champions also qualify for the following season's Copa del Rey. However reserve teams are ineligible. Along with teams from Segunda Federación, the remaining teams from the division compete in the Copa Federación.| Group | Region | Relegation |
| 1 | Galicia | Preferente Futgal |
| 2 | Asturias | Primera Asturfútbol |
| 3 | Cantabria | Regional Preferente |
| 4 | Basque Country | División de Honor |
| 5 | Catalonia and Andorra | Lliga Elit |
| 6 | Valencian Community | Lliga Comunitat |
| 7 | Community of Madrid | Primera División Autonómica |
| 8 | Castile and León | Primera Regional |
| 9 | División de Honor – Group 2 | |
| 9 | Melilla | Primera Autonómica |
| 10 | División de Honor – Group 1 | |
| 10 | Ceuta | Regional Preferente |
| 11 | Balearic Islands | División de Honor |
| 12 | Canary Islands | Interinsular Preferente |
| 13 | Region of Murcia | Preferente Autonómica |
| 14 | Extremadura | Primera División Extremeña |
| 15 | Navarre | Primera Autonómica |
| 16 | La Rioja | Regional Preferente |
| 17 | Aragon | Regional Preferente |
| 18 | Castile-La Mancha | Primera Autonómica Preferente |
Teams
The member clubs of the Tercera Federación for the 2025–26 season are listed below.| Group | Teams |
| Group 1 | |
| Group 2 | |
| Group 3 | |
| Group 4 | |
| Group 5 | |
| Group 6 | |
| Group 7 | |
| Group 8 | |
| Group 9 | |
| Group 10 | |
| Group 11 | |
| Group 12 | |
| Group 13 | |
| Group 14 | |
| Group 15 | |
| Group 16 | |
| Group 17 | |
| Group 18 |