| Club | Stadium | City | Capacity |
|---|---|---|---|
| Albacete | Estadio Carlos Belmonteopened 1960 | Albacete175,400 people | 17,524 |
| UD Logroñés | Estadio Las Gaunasopened 2002 | Logroño152,150 people | 16,000 |
| Barakaldo | Estadio de Lasesarreopened 2003 | Barakaldo102,986 people | 7,960 |
| Real Unión | Stadium Galopened 1926 | Irun63,835 people | 6,344 |
| Real Madrid Castilla | Alfredo Di Stéfano Stadiumopened 2006 | Madrid3,223,334 people | 6,000 |
| Toledo | Estadio Salto del Caballoopened 1973 | Toledo87,216 people | 5,300 |
| Sestao River | Las Llanas Stadiumopened 1923 | Sestao28,512 people | 4,367 |
| Athletic Bilbao B | Lezama Facilities | Bilbao351,124 people | 3,250 |
| Gernika Club | Complejo Deportivo Urbieta | Guernica17,129 people | 3,000 |
| Capacity not recorded yet | |||
| Amorebieta | – | ||
| Arenas Getxo | Estadio Municipal de Gobela | Getxo75,752 people | – |
| Fuenlabrada | – | ||
| Leioa | Zona deportiva de Sarrienaopened 2002 | Leioa32,748 people | – |
| Mensajero | – | ||
| Navalcarnero | – | ||
| Rayo Majadahonda | Miniestadio Cerro del Espino | Majadahonda72,268 people | – |
| Real Sociedad B | Zubieta Facilities | San Sebastián189,866 people | – |
| San Sebastián de los Reyes | – | ||
| Socuéllamos | – | ||
| Zamudio | – | ||
Sources: Wikipedia (CC BY-SA 4.0), API-Football · Data sources