2021–22 Segunda División RFEF

The 2021–22 Segunda División RFEF season was the first for the Segunda División RFEF, the new fourth highest level in the Spanish football league system. It supplanted Tercera División, which downgraded to the fifth tier as Tercera División RFEF and succeeded the old Segunda División B, which was replaced by Primera División RFEF as the third level of the pyramid. Ninety teams will participate, divided into five groups of eighteen clubs each based on geographical proximity. In each group, the champions automatically promoted to Primera División RFEF, and the second to fifth placers will play promotion play-offs. The last five teams in each group will be relegated to the Tercera División RFEF; in addition, the four worst teams classified 13th in their group will play play-offs to define the last two relegation places.

Overview before the season
A total of 90 teams will join the league: 36 from the 2020–21 Segunda División B and 54 promoted from the 2020–21 Tercera División. The final groups were defined on 20 June 2021, with 18 teams divided in five groups.


 * Teams retained from 2020–21 Segunda División B


 * Arenas de Getxo
 * Atlético Levante
 * Badalona
 * Cádiz B
 * Compostela
 * Córdoba
 * Coruxo
 * Don Benito
 * Ebro
 * El Ejido
 * Ejea
 * Espanyol B
 * Hércules
 * Izarra
 * La Nucía
 * Langreo
 * Laredo
 * Las Palmas Atlético
 * Lleida
 * Marino de Luanco
 * Melilla
 * Mérida
 * Murcia
 * Mutilvera
 * Navalcarnero
 * Numancia
 * Osasuna B
 * Peña Deportiva
 * Pontevedra
 * Prat
 * Recreativo Granada
 * Salamanca
 * Socuéllamos
 * Tamaraceite
 * Tarazona
 * Villanovense


 * Teams promoted from 2020–21 Tercera División


 * Águilas
 * Alzira
 * Andratx
 * Antequera
 * Ardoi
 * Arenteiro
 * Arosa
 * Atlético Mancha Real
 * Atlético Pulpileño
 * Avilés Industrial
 * Bergantiños
 * Brea
 * Burgos Promesas
 * Cacereño
 * Calvo Sotelo
 * Cayón
 * Ceares
 * Cerdanyola del Vallès
 * Ceuta
 * Coria
 * Cristo Atlético
 * Eldense
 * Europa
 * Formentera
 * Gernika
 * Gimnástica Segoviana
 * Huesca B
 * Ibiza Islas Pitiusas
 * Intercity
 * Leganés B
 * Llanera
 * UD Logroñés B
 * Mar Menor
 * Marchamalo
 * Mensajero
 * Montijo
 * Móstoles URJC
 * Náxara
 * Panadería Pulido
 * Peña Sport
 * Racing Rioja
 * Rayo Cantabria
 * Real Sociedad C
 * San Fernando
 * San Juan
 * San Roque de Lepe
 * Sestao River
 * Terrassa
 * Teruel
 * Toledo
 * Tropezón
 * Unión Adarve
 * Vélez
 * Xerez Deportivo

Copa del Rey Qualifiers
The following clubs have qualified for the 2022–23 Copa del Rey by virtue of their league finish after reserve teams were excluded: