Amatitlan, a town of Guatemala, Central America, about 18 m. S. of the city of Guatemala, in lat. 14° 30' N., lon. 90° 17' W.; pop. about 15,000. It lies in a volcanic region, near and somewhat below a mountain lake of the same name. It is a principal seat of the cochineal cultivation. The houses are of one story and of mud, roughly moulded. Hot springs abound in the neighborhood. The waters of the lake have a high temperature, and are supposed to possess medicinal qualities.