The 2020–21 Liga de Expansión MX season is the first professional season of the second-tier football division in Mexico. The season is divided into two championships—the and the —each in an identical format and each contested by the same sixteen teams. The Apertura tournament started on 18 August 2020 and concluded on 20 December 2020. The Clausura tournament started on 12 January 2021 and will conclude in May 2021.