Saltillo is the capital and largest city of the northeastern Mexican state of Coahuila and is also the municipal seat of the municipality of the sam…Saltillo is the capital and largest city of the northeastern Mexican state of Coahuila and is also the municipal seat of the municipality of the same name. Mexico City, Monterrey, and Saltillo are all connected by a major railroad and highway. As of a 2020 census, Saltillo had a population of 879,958 people, while the population of its metropolitan area was 1,031,779, making Saltillo the largest city in the state of Coahuila, and the 14th most populated metropolitan area in the country. Saltillo is considered the most competitive city in Mexico for cities with over one million inhabitants. Saltillo's success is due to its strong performance in the Urban Competitiveness Index, which is developed by the Mexican Institute for Competitiveness. The ICU evaluates cities based on 35 indicators, including law, society, infrastructure, labor market, political system, and innovation. Saltillo is also the safest capital city in Mexico, according to INEGI data in 2025
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