1977–78 Segunda División
The 1977–78 Segunda División season saw 20 teams participate in the second flight Spanish league. Real Zaragoza, Recreativo de Huelva and Celta de Vigo were promoted to Primera División. Real Oviedo, Córdoba CF, CD Tenerife and CF Calvo Sotelo were relegated to Segunda División B.
From this season, immediately below Segunda División there is a new league Segunda División B. Thus, Tercera División became the fourth level in the Spanish football pyramid.
Teams
| Club | City | Stadium |
| Alavés | Vitoria | Mendizorrotza |
| Barakaldo | Barakaldo | Lasesarre |
| Calvo Sotelo | Puertollano | Calvo Sotelo |
| Castellón | Castellón de la Plana | Castalia |
| Celta Vigo | Vigo | Balaídos |
| Córdoba | Córdoba | El Árcangel |
| Deportivo La Coruña | La Coruña | Riazor |
| Getafe Deportivo | Getafe | Las Margaritas |
| Granada | Granada | Los Cármenes |
| Jaén | Jaén | La Victoria |
| Málaga | Málaga | La Rosaleda |
| Murcia | Murcia | La Condomina |
| Osasuna | Pamplona | El Sadar |
| Oviedo | Oviedo | Carlos Tartiere |
| Recreativo Huelva | Huelva | Municipal |
| Sabadell | Sabadell | Nova Creu Alta |
| Tenerife | Santa Cruz de Tenerife | Heliodoro Rodríguez López |
| Terrassa | Terrassa | Olímpic de Terrassa |
| Real Valladolid | Valladolid | José Zorrilla |
| Real Zaragoza | Zaragoza | La Romareda |
Final table
Results
[Pichichi Trophy] for top goalscorers
| Goalscorers | Goals | Team |
 Alfonso Castro | Deportivo de La Coruña | |
| Pichi Alonso | Zaragoza | |
| José Luis | Granada |