Saltillo is the capital and largest city of the northeastern Mexican state of Coahuila and the municipal seat of the municipality of the same name. The city is located about 400 km south of the U.S. state of Texas, and 90 km west of Monterrey, Nuevo León. As of the 2005 census, Saltillo had a population of 725,095 people. 823,098 people reside within the metropolitan area, making it the 19th biggest metro area in the country. The metro area comprises the municipalities of Saltillo, Ramos Arizpe, and Arteaga.