The 1980–81 Tercera División season was the 4th season since establishment as the 4th tier.
League tables
Group I
Group II
Group III
Group IV
Group V
Group VI
Group VII
Group VIII
Group IX
Group X
Group XI
Group XII
Group XIII
Promotion playoff
First round
Final Round
Season records Most wins: 28, Real Valladolid Promesas and Poblense. Most draws: 16, Lagun Onak, Bergara and Santomera. Most losses: 30, Toledo. Most goals for: 97, Real Valladolid Promesas. Most goals against: 99, Loja. Most points: 64, Real Valladolid Promesas. Fewest wins: 2, Toledo. Fewest draws: 3, Ponferradina. Fewest losses: 2, Poblense. Fewest goals for: 21, Toledo. Fewest goals against: 16, Poblense. Fewest points: 10, Toledo.
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