Eighty teams participated, distributed across four groups of twenty clubs each.
[1] 80 teams joined the league, including three relegated from the 2017–18 Segunda División, 18 promoted from the 2017–18 Tercera División and Ibiza, that replaced Lorca FC after the latter did not fulfill the economic requirements and was banned from playing in Segunda División B.
This is a list of attendance data of the teams that give an official number.
They include playoffs games: Notes: 1: Team played last season in Segunda División.
2: Team played last season in Tercera División.