Segunda División B 2018–19

The 2018–19 Segunda División B season will be the 41st since its establishment.

Teams
The following teams have assured qualification to the 2018–19 Segunda División B season. The RFEF will cofirm the groups, determined by geographical criteria, in July.


 * Alcoyano
 * Amorebieta
 * Arenas
 * Atlético Baleares
 * Atlético Madrid B
 * Badajoz
 * Badalona
 * Barakaldo
 * Burgos
 * Ebro
 * El Ejido
 * Gernika


 * Granada B
 * Guijuelo
 * Hércules
 * Jumilla
 * Las Palmas Atlético
 * Leioa
 * Linense
 * Lleida Esportiu
 * Lorca FC
 * Melilla
 * Navalcarnero
 * Olot


 * Ontinyent
 * Peralada
 * Ponferradina
 * Pontevedra
 * Racing Santander
 * Rápido de Bouzas
 * Real Madrid Castilla
 * Real Unión
 * Recreativo
 * Sabadell
 * San Fernando


 * San Sebastián de los Reyes
 * Sevilla Atlético
 * Talavera de la Reina
 * Tudelano
 * UCAM Murcia
 * UD Logroñés
 * Unión Adarve
 * Valencia Mestalla
 * Valladolid B
 * Villanovense
 * Vitoria