The 1955–56 Tercera División season was the 20th since its establishment.
League table
Group 1
Regular season
Permanence Phase
Group 2
Regular season
Permanence Phase
Group 3
Group 4
Group 5
Group 6
Group 7
Group 8
Mallorca
Menorca
Play-offs
Tiebreaker:
Group 9
Group 10
Group 11
Group 12
Group 13
Group 14
Group 15
Group 16
Promotion play-offs
Group 1
Group 2
Group 3
Group 4
Promotion/relegation Segunda División
Tiebreaker:
Promotion to Segunda: Eldense Remain on Segunda:: Sestao, Logroñés & Castellón Relegation to Tercera: Plus Ultra
Tercera División play-offs
First round
Second round
Tiebreaker:
Third round
Tiebreaker:
Promotion to Segunda: Avilés, Rayo Vallecano, Alicante & Pontanés
External links RSSSF Futbolme