80 teams will join the league, including four relegated from the 2016–17 Segunda División and 18 promoted from the 2016–17 Tercera División.
The composition of the groups was determined by the Royal Spanish Football Federation, attending to geographical criteria.
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.