The 1990–91 Segunda División was the 42nd season of the Mexican Segunda División. The season started on 3 August 1990 and concluded on 17 July 1991. It was won by Atlante.
Changes León was promoted to Primera División. Atlante was relegated from Primera División. Querétaro was promoted to Primera División after bought the Tampico Madero franchise. Pioneros de Cancún bought the Querétaro spot in Segunda División. Cachorros Zamora and Guerreros Acapulco were promoted from Segunda División B. Zitlaltepec was promoted from Tercera División. SUOO, Galicia and Ayense were relegated from Segunda División. Petroleros Salina Cruz license was bought by Real Celaya.
Teams
ClubCityStadiumAtlanteMexico CityEstadio AzulgranaAtlético PotosinoSan Luis PotosíEstadio Plan de San LuisBachilleresGuadalajaraEstadio Tecnológico UdeGCachorros ZamoraZamoraUnidad Deportiva El ChamizalChetumalChetumalEstadio José López PortilloEcatepecEcatepec de MorelosEstadio MorelosGuerreros AcapulcoAcapulcoUnidad Deportiva AcapulcoInter de TijuanaTijuanaEstadio Cerro ColoradoJaliscoGuadalajaraEstadio JaliscoClub San RafaelLa PiedadLa PiedadEstadio Juan N. LópezLeones SaltilloSaltilloEstadio Olímpico Francisco I. MaderoPachucaPachucaEstadio Revolución MexicanaPioneros CancúnCancúnEstadio Cancún 86Real CelayaCelayaEstadio Miguel Alemán ValdésTecománTecománEstadio IAETACTepicTepicEstadio Nicolás Álvarez OrtegaUAQQuerétaro CityEstadio CorregidoraYucatánMéridaEstadio Carlos IturraldeZacatepecZacatepecEstadio Agustín "Coruco" DíazZitlaltepecSan Juan ZitlaltepecEstadio Los Brujos
Group stage Group 1
Group 2
Group 3
Group 4
Results
Final stage Group 1
Group 2
Final
References