The Mexican football champions are the national champions of the Liga MX, which is the top professional division in Mexico.
Formerly known as Liga Mayor from 1943 to 1949, and then as Primera División de México from 1949 to 2012.
The first season in the professional era began in 1943.
Since 1970 a final phase called "liguilla" has been held to define the champions.
Since 1996 there are two champions every year, starting with the Invierno and Verano tournaments (1996–2002), later with the Apertura and Clausura tournaments (2002–present).