Acapulco, a seaport town of Mexico, on the Pacific, in the state of Guerrero, 180 m. S. by W. of Mexico; lat. 16° 50' N., lon. 99° 48 W.; pop. about 4,000. It has one of the best harbors on the W. coast, and during the Spanish dominion in Mexico was the focus of the trade from China and the East Indies, and a place of considerable importance. It has since relapsed into insignificance, although previous to the opening of the Pacific railroad the California trade imbued it with a transitory commercial life, in consequence of its having been made the coaling station for the steamers between Panama and San Francisco.