There were 360 clubs competing in Tercera División (Third division) in the 2010–11 season, divided into 18 regional groups, accommodating between 19 and 21 clubs.
The following clubs finished as champions of their respective groups
The 18 group champion clubs participated in the Group winners promotion play-off and the losers from these 9 play-off ties then proceeded to the Non-champions promotion play-off with clubs finishing second third and fourth.
^Mesón do Bento resigned from Tercera División at the end of the season and thus relegated to Preferente Autonómica, so Cultural Areas was re-admitted to Tercera División.
^Due to Pontevedra's relegation from Segunda División B to this group, the reserve team, Pontevedra B, was forced to relegate to Primeira Autonómica.