The 2020–21 Liga TDP season is the fourth-tier football league of Mexico.
The league format allows participating franchises to rent their place to another team, so some clubs compete with a different name than the one registered with the FMF.
Group with 12 teams from Campeche, Quintana Roo, Tabasco and Yucatán.
[1][2] Note: Delfines Márquez was announced as a participant for the season, but was excluded from the league after week 15 for failing to fulfill his obligations as an affiliated club.
[1][2] Note: Promodep Central was enrolled in the season, but the team was retired after week 23.
Group with 19 teams from Guanajuato, Jalisco, Michoacán and Querétaro.
was enrolled in the season, but was expelled after week 6 for failing to fulfill its obligations as an affiliate.
Group with 13 teams from Aguascalientes, Durango, Guanajuato, Jalisco, Michoacán, San Luis Potosí and Zacatecas.
Group with 8 teams from Coahuila, Nuevo León and Tamaulipas.
[1][2] Although this group was officially announced by the League, no match was ever played between its members.
Eliminations will be held according to the average obtained by each team, being ordered from best to worst by their percentage throughout the season.
As of this season, the names of the knockout stages were modified as follows: Round of 32, Round of 16, Quarter-finals, Semifinals, Zone Final and Final, this as a consequence of the division of the country into two zones, for so the teams only face clubs from the same region until the final series.