San Antonio District is one of the fourteen districts of the province Grau in Peru. Instituto Nacional de Estadística e Informática. Banco de Información Digital . Retrieved April 7, 2008.
Ethnic groups The people in the district are mainly indigenous citizens of Quechua descent. Quechua is the language of which the majority of the population (62.95%) are native speakers; 37.05% of the population speaks fluent Spanish (2007 Peru Census).inei.gob.pe INEI, Peru, Censos Nacionales 2007, Frequencias: Preguntas de Población: Idioma o lengua con el que aprendió hablar (in Spanish)
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