The 1974–75 Tercera División was the 41st edition since its establishment.
League tables
Group I
Group II
Group III
Group IV
Promotion playoff
Relegation playoff
Tiebreakers
Season records Most wins: 28, Osasuna. Most draws: 16, Torrejón. Most losses: 28, Unión Club. Most goals for: 79, Osasuna. Most goals against: 97, Unión Club. Most points: 61, Osasuna. Fewest wins: 5, Caudal and Unión Club. Fewest draws: 3, Tortosa. Fewest losses: 5, Osasuna. Fewest goals for: 26, Real Granada. Fewest goals against: 25, Deportivo de La Coruña. Fewest points: 15, Unión Club.
External links RSSSF Futbolme