Ascenso MX
| Organising body | Federación Mexicana de Fútbol (FMF) |
|---|---|
| Founded | 1994 (as Primera División "A" de México) |
| Folded | 2020 |
| Country | Mexico |
| Confederation | CONCACAF |
| Number of clubs | 12 |
| Level on pyramid | 2 |
| Promotion to | Liga MX |
| Relegation to | Liga Premier |
| Domestic cup(s) | Copa MX (2012–2020) Campeón de Ascenso (1997–2019) |
| Last champions | Oaxaca (2nd title) |
| Most championships | Sinaloa León Irapuato Necaxa (4 titles each) |
| Website | ascensomx |
| Current: Apertura 2019 Ascenso MX season | |
Ascenso MX, officially named Ascenso BBVA MX for sponsorship reasons, was a professional association football league in Mexico and the second level of the Mexican football league system. Formerly named Primera División "A" de México (1994–2009) and Liga de Ascenso de México (2009–2012). The season was divided into two short tournaments, according to FIFA world football calendar: Apertura (from July to December) and Clausura (from January to May). The champions of each tournament were decided by a final knockout phase, commonly known as liguilla. The clubs promoted to Liga MX were the winners of the Campeón de Ascenso between the two league champions of the season. The bottom club was relegated to Liga Premier.
The inaugural edition was the 1994–95 season, with Celaya as the first champions in history. The final edition was the Apertura 2019 tournament, with Oaxaca as the last champions. In all, forty-nine editions of the league were held.
Sinaloa, León, Irapuato and Necaxa were the most successful clubs with four titles each, followed by Querétaro with three titles. In all, twenty-seven clubs won the league at least once.