Miss República Dominicana 1984 was held on 1984-07-18 at the Palacio de Bellas Artes in Santo Domingo, República Dominicana, with 18 delegates. Sumaya Alejandrina Heinsen Pérez (Puerto Plata) won and later represented the country at Miss Universo 1984. The Miss World Dominican Republic title went to Mayelinne de Lara (Seibo) for Miss Mundo 1984, and Miss Dominican Republic Coffee to Marisol Serret (San Cristóbal) for Reinado Internacional del Café 1984. Other semifinalists entered additional international pageants.