1977–78 Mexican Segunda División season

The 1977–78 Segunda División was the 29th season of the Mexican Segunda División. The season started on 8 July 1977 and concluded on 7 May 1978. It was won by Zacatepec.

Starting this season, 3 points were awarded for victory with more than two goals difference.

Changes

 * Atlante was promoted to Primera División.
 * Zacatepec was relegated from Primera División.
 * Estado de México was promoted from Tercera División.
 * Celaya was relegated from Segunda División.
 * Córdoba was renamed as Universidad Veracruzana de Córdoba.
 * Ciudad Sahagún was bought by new owners, the club was moved to Acapulco and renamed as Inter Acapulco.

During the season

 * After Week 4, Tampico was promoted to the Primera Division after purchasing the San Luis franchise. The place of Tampico was purchased by Bachilleres.
 * After Week 15, the UAEM franchise was bought by new owners, the club was relocated at Ciudad Nezahualcóyotl and renamed as Coyotes Neza.