 It borders the municipality of Agualeguas to the north, the municipality of Higueras to the west, the municipality of Doctor González to the southwest, the municipality of Los Ramones to the south, and the municipalities of Los Herreras, Melchor Ocampo, and General Treviño to the east.The municipal seat of Cerralvo, Ciudad Cerralvo, is located at 26° 5' N, 99° 36' W, and is 345 meters above sea level.In 1577, José Luis Carvajal y de la Cueva founded the village of Saltillo; in the same year, he also founded Santa Lucía, now called Monterrey, and discovered the mines of San Gregorio, located in what is now called Cerralvo.