San Francisco de los Romo is a city in the Mexican state of Aguascalientes. It serves as the municipal seat for the surrounding municipality of San Francisco de los Romo.San Francisco de los Romo stands at in the central part of the state. The town, which is the state's sixth-largest community, is located at the northwest corner of the municipality.DemographicsAs of 2010, the city had a total population of 16,124.