I guess you mean second most populated. Guadalajara (pop: 4,095,853) is such city.
Wrestling
Cancun and Mexico City.
How about Mexico city....it's the capital ;)
The second largest city in Mexico is Guadalajara.
Mexico city
Mexico - North America's largest city, Mexico City, is located in Mexico. It is also the world's second-largest city.
Yes, Mexico City is a primate city (its the capital of Mexico and it has more than twice the population of Mexico's second largest city, Guadalajara).
Tijuana.
Cancun
Karachi, Pakistan is the second largest city in the world by population.
baseball
For being Mexico's second largest city after Mexico City, and the country's third most populous city after Mexico City and Guadalajara. Also for being Mexico's industrial capital.