San Sebastián Coatán is a municipality in the Guatemalan department of Huehuetenango. Its territory extends 560 km², is 2,350m above sea level and has a cooler climate. It has 18,022 inhabitants who speak Spanish and Chuj. It borders San Mateo Ixtatán and Nentón to the north, San Rafael la Independencia and Santa Eulalia to the east, San Miguel Acatán to the south and Nentón to the west.