Liga TDP
 | |
| Organising body | Federación Mexicana de Fútbol |
|---|---|
| Founded | 1967 as Tercera División de México |
| Country | Mexico |
| Confederation | CONCACAF |
| Number of clubs | 246 (Zona A and Zona B) |
| Level on pyramid | 4 |
| Promotion to | Liga Premier |
| Domestic cup | Copa Conecta |
| Current champions | Delfines de Coatzacoalcos (1st title) |
| Most championships | Celaya San Luis Tecos Atlético Tecomán Cuautitlán Cihuatlán Héroes de Zaci (2 titles each) |
| Website | ligatdp.mx |
| Current: 2026–27 Liga TDP season | |
Liga TDP is a professional association football league in Mexico and the fourth level of the Mexican football league system. Formerly known as Tercera División de México (1967–2017). The league is contested by 246 participating clubs, organized into two zones (Zona A with 136 clubs and Zona B with 110 clubs), divided into 18 groups by geographic location. The season consists of an annual tournament, and the champions are decided by a final knockout phase in each zone. The Zona A and Zona B champions compete in the national final and the winners are crowned Liga TDP champions.
The league has held 67 editions. The inaugural edition was the 1967–68 season, with Zapata crowned as the first champions.
From 1967 to 1994, it was the third level of Mexican football. The 18 groups consist of clubs eligible for four promotion spots to Liga Premier, teams affiliated with clubs from the highest levels, which are known as "filiales" are not eligible for promotion.
Fifty-nine clubs have won the title at least once. Celaya, San Luis, Tecos, Atlético Tecomán, Cuautitlán, Cihuatlán and Héroes de Zaci are the most successful clubs with two titles each.