1989–90 Mexican Segunda División season

The 1989–90 Segunda División was the 41st season of the Mexican Segunda División. The season started on 18 August 1989 and concluded on 3 June 1990. It was won by León.

Changes

 * Potros Neza won the promotion to Primera División. However, because the club was the Atlante reserves team, the spot in the Division was bought by Veracruz.
 * Atlético Potosino was relegated from Primera División.
 * Bachilleres and Galicia were promoted from Segunda División B.
 * Ayense was promoted from Tercera División.
 * Tapatío, Pioneros Cancún and FEG were relegated from Segunda División.
 * Orizaba franchise was bought by new owners, the team was relocated at Tijuana and renamed as Inter de Tijuana.

During the season

 * Before week 18, Nuevo León was sold, the new owners relocated the team in Saltillo and renamed it as Leones de Saltillo.