This edition did not require a draw for the playoff promotion to Second B as in previous editions. Due to the pandemic, it has been decided that the playoffs be decided between the teams in the same group. In this way, the first will face the fourth and the second the third (see pairings below). The two winners from each group will be measured in a final by promotion.
Therefore, each Territorial Federation has had to find its own headquarters in its Autonomous Community to dispute the promotion. This phase of promotion, which if it coincides in the criterion of play single game as in the promotion to Second, it will have another striking novelty, such as the way of resolution in the event that a match ends in a draw. There will be no overtime or penalties, the best place in the league advances. In addition to the 18 that are champions, there will be two other promoted among the first of each group who do not succeed. It is not yet known what the criteria will be, but it could be solved through a tie between the candidates.
The first tie will be played on July 18 and 19; while the second, in which the promoted will be decided, will take place on Saturday 25 of the same month. In case of resorting to the dispute of a new tie to decide the other two promoted, it would be held between August 1 and 9.
Group i
Compostela-Barco
Ourense-Arosa
Headquarters: Municipal de Balaídos
Group II
Loyalty-Sports Flow
UD Llanera-CD Covadonga
Headquarters: Suárez Puerta
Group III
CD Laredo-Tropezón
RS Gimnástica-Rayo Cantabria
Headquarters: Fernando Astobiza de Sarón
Group IV
Portugalete-Basconia
Sestao River-Vitoria CD
Headquarters: Sarriena
Group v
L`Hospitalet-Sant Andreu
Terrrassa-Europe
Headquarters: Municipal de Badalona
Group VI
Alcoyano-Intercity
Alzira-Atzeneta
Headquarters: not decided
Group VII
Navalcarnero-Alcalá
Adarve-Alcorcón B
Headquarters: García de la Mata
Group VIII
Zamora-Numancia B
Gª Segoviana-Arandina
Headquarters: Nueva Balastera
Group IX
Linares-Real Jaén
El Ejido 2012-Motril
Venue: Marbella Football Center and Municpal Lorenzo Cuevas
Group x
Betis B-Utrera
City of Lucena-Xerez
Venue: Marbella Football Center and Municipal Lorenzo Cuevas
Group XI
Poblense-Felanitx
CD Ibiza Pitiusas-Mallorca B
Headquarters: Municipal de Santanyí
Group XII
CD Marino-Tamaraceite
Tenisca-San Fernando
Venue: Municipal Stadium of El Hierro.
Group XIII
Lorca Deportiva-Mazarrón
Atlético Pulpileño-Mar Menor
Venue: Pinatar Arena
Group XIV
Villanovense-Extremadura B
Coria-Cacereño
Venue: Roman Stadium of Mérida
Group XV
Mutilvera-CD Pamplona
AD San Juan-Beti Kozkor KE
Headquarters: Merkatondoa
Group XVI
SD Logroñés-Arnedo
Varea-Casalarreina
Headquarters: Las Gaunas
Group XVII
Tarazona-Deportivo Aragón
Teruel-Brea
Venue: Pedro Sánchez Stadium
Group XVIII
Socuéllamos-Toledo
Quintanar-Guadalajara
Headquarters: Municipal Delgado Meco