2008 Tercera División play-offs
The 2008 Tercera División play-offs to Segunda División B from Tercera División were the final playoffs for the promotion from 2007–08 Tercera División to 2008–09 Segunda División B. In some groups four teams took part in the play-off while other groups have only three.
- The teams highlighted in yellow played the Play-Offs to Segunda División B.
- The teams highlighted in red were relegated to Divisiones Regionales.
- All groups as 38 of 38 rounds.
----
----
----
----Eliminatories
- The regular season finished the 18 May 2008.
- The play-offs began the 24 and 25 of May.'''
Group 1
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:Sangonera Atlético
----Group 2
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:FC Barcelona B
----Group 3
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:Ciudad Santiago
----Group 4
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:CD San Fernando
----Group 5
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:Racing Santander B
----Group 6
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:UD Alzira
----Group 7
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:Las Palmas B
----Group 8
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:CD Roquetas
----Group 9
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:Antequera CF
----Group 10
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:Real Murcia B
----Group 11
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:UE Sant Andreu
----Group 12
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:Valencia Mestalla
----Group 13
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:Atlético Baleares
----Group 14
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:Ciudad Lorquí
----Group 15
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:CDA Navalcarnero
----Group 16
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:Balompédica Linense
----Group 17
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:Santa Eulàlia
----Group 18
- 1st Eliminatory:
- 2nd Eliminatory:
- *Promoted to Segunda División B:Sporting de Gijón B
