The –SegundaDivisió1980–81 Segunda División B was the 4th season of Segunda División B, the third highest level of the Spanish football league system, since its establishment in 1977. First and 2nd in each group were promoted to Segunda División, and the bottom three were relegated to the Tercera División.
Group 1
A total of 20 teams will contest the group, including 2 relegated from the Segunda División and 4 promoted from the Tercera División.
Promotion and relegation
Teams relegated from 1979–80 Segunda División
Celta de Vigo
Deportivo de La Coruña
Teams promoted from 1979–80 Tercera División
SD Compostela
San Sebastián CF
RSD Alcalá
Gimnástica Arandina
Teams
Teams from Aragon, Asturias, Basque Country, Canary Islands, Castile and León, Galicia, La Rioja and Madrid.
League table
Results
Top goalscorers
Top goalkeepers
Group 2
A total of 20 teams will contest the group, including 2 relegated from the Segunda División and 4 promoted from the Tercera División.
Promotion and relegation
Teams relegated from 1979–80 Segunda División
Algeciras CF
Gimnástico de Tarragona
Teams promoted from 1979–80 Tercera División
RCD Mallorca
Cartagena FC
FC Andorra
Mérida
Teams
Teams from Andalusia, Andorra, Balearic Islands, Castilla–La Mancha, Catalonia, Extremadura, Region of Murcia and Valencian Community.