| Club | Stadium | City | Capacity |
|---|---|---|---|
| Cultural Leonesa | Estadio Reino de Leónopened 2001 | León123,446 people | 13,451 |
| Tudelano | Estadio Ciudad de Tudelaopened 1969 | Tudela38,903 people | 10,000 |
| Numancia | Nuevo Estadio Los Pajaritosopened 1999 | Soria41,025 people | 9,025 |
| Palencia | Estadio Nueva Balasteraopened 2002 | Palencia77,466 people | 8,070 |
| Barakaldo | Estadio de Lasesarreopened 2003 | Barakaldo102,986 people | 7,960 |
| Real Unión | Stadium Galopened 1926 | Irun63,835 people | 6,344 |
| Beasain | Loinaz Udal Futbol Zelaiaopened 1959 | Beasain14,048 people | 6,000 |
| Real Avilés Industrial | Estadio Román Suárez Puertaopened 1943 | Avilés75,517 people | 5,352 |
| Lemona | Arlonagusia | Lemoa3,614 people | 5,000 |
| Izarra | Estadio Merkatondoaopened 1928 | Estella-Lizarra14,317 people | 3,500 |
| Sporting Atlético | Escuela de Fútbol de Mareoopened 1978 | Gijón269,894 people | 3,000 |
| Capacity not recorded yet | |||
| Amurrio Club | – | ||
| Aurrerá de Vitoria | – | ||
| Bermeo | – | ||
| Durango | – | ||
| Langreo | – | ||
| Logroñés B | – | ||
| Osasuna Promesas | Tajonar Facilities | Pamplona209,094 people | – |
| Real Sociedad B | Zubieta Facilities | San Sebastián189,866 people | – |
| Real Valladolid Promesas | – | ||
Sources: Wikipedia (CC BY-SA 4.0), API-Football · Data sources