Rosario de Tesopaco Municipality is a municipality in Sonora in north-western Mexico. Area and population The municipal area is 3,301.90 km2 with a population of 5,432 registered in 2000. The population of the municipal seat was 2,649 in 2000. It is located at an elevation of 450 meters. Neighboring municipalities Neighboring municipalities are: State of Chihuahua Yécora—northeast Aconchi Municipality—east Álamos Municipality—southeast Quiriego Municipality—south Cajeme Municipality—west References Municipalities of Sonora