1979–80 Segunda División B
The 1979–80 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 DivisiónTeams promoted from 1978–79 Tercera División
Teams
Teams from Aragon, Asturias, Basque Provinces, Canary Islands, Galicia, León, New Castile and Old Castile.| Team | Founded | Home city | Stadium |
| Arenas de Getxo | 1909 | Getxo, Basque Provinces | Gobela |
| Atlético Madrileño | 1969 | Madrid, New Castile | Vicente Calderón |
| Baracaldo | 1917 | Barakaldo, Basque Provinces | Lasesarre |
| Bilbao Athletic | 1964 | Bilbao, Basque Provinces | Lezama |
| Cultural Leonesa | 1923 | León, León | Antonio Amilivia |
| Ensidesa | 1956 | Avilés, Asturias | Muro de Zaro |
| Getxo | 1927 | Getxo, Basque Provinces | Fadura |
| Huesca | 1960 | Huesca, Aragon | El Alcoraz |
| Langreo | 1961 | Langreo, Asturias | Ganzábal |
| Las Palmas Atlético | 1977 | Las Palmas, Canary Islands | Insular |
| Logroñés | 1940 | Logroño, Old Castile | Las Gaunas |
| Mirandés | 1927 | Miranda de Ebro, Old Castile | Anduva |
| Orense | 1952 | Ourense, Galicia | O Couto |
| Pontevedra | 1941 | Pontevedra, Galicia | Pasarón |
| Racing de Ferrol | 1919 | Ferrol, Galicia | Manuel Rivera |
| Sestao | 1916 | Sestao, Basque Provinces | Las Llanas |
| Sporting Atlético | 1960 | Gijón, Asturias | Mareo |
| Tenerife | 1912 | Tenerife, Canary Islands | Heliodoro Rodríguez López |
| Torrejón | 1953 | Torrejón de Ardoz, New Castile | Las Veredillas |
| Zamora | 1968 | Zamora, León | Ramiro Ledesma |
League table
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 DivisiónTeams promoted from 1978–79 Tercera División
Teams
Teams from Andalusia, Balearic Islands, Catalonia, Extremadura, New Castile and Valencia.| Team | Founded | Home city | Stadium |
| Badajoz | 1905 | Badajoz, Extremadura | Vivero |
| Barcelona Atlético | 1970 | Barcelona, Catalonia | Fabra i Coats |
| Calvo Sotelo | 1948 | Puertollano, Castilla–La Mancha | Calvo Sotelo |
| Ceuta | 1970 | Ceuta | Alfonso Murube |
| Córdoba | 1954 | Córdoba, Andalusia | El Árcangel |
| Díter Zafra | 1930 | Zafra, Extremadura | Nuevo Estadio de Zafra |
| Eldense | 1921 | Elda, Valencia | Pepico Amat |
| Gerona | 1930 | Girona, Catalonia | Montilivi |
| Ibiza | 1956 | Ibiza, Balearic Islands | Carrer Canàries |
| Real Jaén | 1929 | Jaén, Andalusia | La Victoria |
| Linares | 1961 | Linares, Andalusia | Linarejos |
| Lleida | 1939 | Lleida, Catalonia | Camp d'Esports |
| Onteniente | 1947 | Ontinyent, Valencia | El Clariano |
| Portuense | 1928 | El Puerto de Santa María, Andalusia | José del Cuvillo |
| San Andrés | 1909 | Barcelona, Catalonia | Calle Santa Coloma |
| San Fernando | 1940 | San Fernando, Andalusia | Marqués de Varela |
| Sevilla Atlético | 1950 | Seville, Andalusia | Ciudad Deportiva José Ramón Cisneros Palacios |
| Terrassa | 1906 | Terrassa, Catalonia | Olímpic de Terrassa |
| Vall de Uxó | 1975 | La Vall d'Uixó, Valencia | José Mangriñán |
| Xerez | 1947 | Jerez de la Frontera, Andalusia | Domecq |