Sitting on 420 acres in Walnut, California, Mt. San Antonio College is strategically located in the center of the district it serves. While the college accepts students from outside of the district and even internationally, its district focuses on serving communities on the eastern edge of Los Angeles County, including Baldwin Park, Bassett, Charter Oak, Covina, Diamond Bar, the southern portion of Glendora, Hacienda Heights, City of Industry, Irwindale, La Puente, La Verne, Pomona, Rowland Heights, San Dimas, Valinda, Walnut, and West Covina.