Señorita República Dominicana 1978 was held on December 14, 1977. There were 28 candidates who competed for the national crown. The winner represented the Dominican Republic at the Miss Universe 1978. The Señorita República Dominicana Mundo will enter Miss World 1978. Only contestants for 27 provinces and one municipality entered. For the top 10 they showed their evening gown and answered questions so they could go to the top 5. In the top 5 they answered more questions.