Agualeguas is both a city and a municipality located in the northeastern part of the state of Nuevo León, Mexico, (26°19′N 99°32′W / 26.317°N 99.533°W). The name "Agualeguas" honors the first inhabitants of the region, the Gualegua tribe. It was recognized as a village on January 7, 1821, by the colonial government when Bro. Diego Velázquez declared it the village of "St. Nicholas of Gualeguas."
The municipality has an area of 917.6 km2 and is located 180 meters above sea level. According to the 2000 census, there are 4,492 inhabitants.