The 2015–16 Segunda División B season was the 39th since its establishment.
The first matches of the season were to be played in August 2015, and the season ended in June 2016 with the promotion play-off finals.
80 teams will join the league, including four relegated from the 2014–15 Segunda División and 18 promoted from the 2014–15 Tercera División.
This is a list of attendance data of the teams that give an official number.
Notes: 1: Team played last season in Segunda División.