The –SegundaDivisió1979–80 Segunda División B was the 3rd 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 four 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 1978–79 Segunda División
Baracaldo CF
Racing de Ferrol
Teams promoted from 1978–79 Tercera División
Las Palmas Atlético
Sporting Atlético
Arenas de Guecho
CD Guecho
Teams
Teams from Aragon, Asturias, Basque Provinces, Canary Islands, Galicia, León, New Castile and Old Castile.
League table
Sporting Atlético was called CD Gijón until last season.
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 1978–79 Segunda División
Terrassa FC
Real Jaén
Teams promoted from 1978–79 Tercera División
CD San Fernando
CD Eldense
UD Vall de Uxó
Teams
Teams from Andalusia, Balearic Islands, Catalonia, Extremadura, New Castile and Valencia.
League table
Terrassa FC was called Tarrasa CF until last season. UD San Andrés was called CD San Andrés until last season.