Acapulco de Juárez is one of the 81 municipalities of Guerrero, in southwestern Mexico, along Acapulco Bay on the Pacific coast, bein…Acapulco de Juárez is one of the 81 municipalities of Guerrero, in southwestern Mexico, along Acapulco Bay on the Pacific coast, being both the most populous and most densely populated municipality in Guerrero. The municipal seat lies at Acapulco.