What are the two largest cities in mexico?

by size or population?

Explanation:

Mexico City

Mexico City is the capital of Mexico and by far the most populated city in the country. By population, Mexico City is the largest city in North America and one of the largest cities in the world. The population was 8.56 million in 2014, and the city has remained the principal manufacturing point and attracts both the skilled and semi-skilled workers from all parts of the country. Mexico City has most industries within the metropolitan area and not centralized within the Federal District. In the 1990s, the government forced some industries to relocate or close down because of air pollution. Some of the light manufacturing industries in the city include clothing, paper, chemical, plastics, cement, food processing, and electronics. Mexico City is home to the seat of the Mexican Government.

Ecatepec City

It is the second largest municipality of the greater Mexico City with a population of 1.7 million people as of 2014. The city is part of the suburb of Mexico City and ranked the 15th most populous suburbs in the world. It is also known as Ecatepec de Morelos and most of its inhabitant's commute to work to Mexico City, and the Mexico City metro subway was extended to serve Ecatepec.