The 2012–13 Segunda División season (known as the Liga Adelante for sponsorship reasons) was the 82nd since its establishment.

[1][2] A total of 22 teams contested the league, including 15 sides from the 2011–12 season, four promoted from the 2011–12 Segunda División B and three relegated from 2011–12 La Liga.

Deportivo de La Coruña was promoted the previous season and made their immediate return to the top level, Celta de Vigo after five years in the Segunda División, and the other team promoted to La Liga as play-off winner was Valladolid after two years of absence.

The teams relegated the previous season were Villarreal B, Gimnàstic de Tarragona, Alcoyano and Cartagena.

This ranking takes into account aspects[52] such as cards, suspension of matches, audience behaviour and other penalties.