| Winner: | Rosario del Carmen Rodríguez |
| Represented: | Distrito Nacional |
| Date: | September 1, 1989 |
| Venue: | Estudio A de Rahintel, Santo Domingo, Dominican Republic |
| Next Pageant: | Miss Universe 1989 |
| Broadcaster: | Color Vision |
| Entrants: | 22 |
Miss República Dominicana 1990 was held on September 1, 1989. There were 22 candidates, representing provinces and municipalities, who entered. The winner would represent the Dominican Republic at Miss Universe 1990. The first runner up would enter Miss World 1990. The second runner up would enter in Miss International 1990. The rest of finalist entered different pageants.[1]
| Final Results | Contestant | |
|---|---|---|
| Miss República Dominicana 1990 |
| |
| 1st Runner-up |
| |
| 2nd Runner-up |
| |
| 3rd Runner-up |
| |
| 4th Runner-up |
|
| Represented | Contestant | Age | Height | Hometown |
|---|---|---|---|---|
| Ana Karina Bettner Riosanchez | 20 | 1.75 | Santo Domingo | |
| Mayra Joli | 24 | 1.80 | Santo Domingo | |
| Eva Javielina Espinoza de Arollo | 23 | 1.71 | Concepción de la Vega | |
| Tatiana Rojas Pérez | 21 | 1.76 | Santo Domingo | |
| Rosario del Carmen Rodríguez | 19 | 1.83 | Santo Domingo | |
| Ada Catalina Fiallo Bennett | 24 | 1.72 | San Francisco de Macorís | |
| Ama Evageline Cepeda Inoa | 25 | 1.70 | San Felipe de Puerto Plata | |
| Christina Salcedo Oviedo | 19 | 1.71 | Salvaleón de Higüey | |
| July Margarita Ramírez de Arias | 18 | 1.73 | Santo Domingo | |
| María Altagracia Peña Vásquez | 22 | 1.77 | Salvaleón de Higüey | |
| Wilma Alicia Germán Castaño | 18 | 1.74 | Santiago de los Caballeros | |
| Nikauly de la Mota | 23 | 1.78 | Concepción de la Vega | |
| Minerva Argentina Quirós Sosa | 20 | 1.80 | Santo Domingo | |
| Brenda Carolina Marte Lajara | 19 | 1.83 | Santiago de los Caballeros | |
| Vivian Aelin Calderón Sánchez | 21 | 1.82 | San Felipe de Puerto Plata | |
| Liona María Pigueras Fonseca | 24 | 1.84 | San Felipe de Puerto Plata | |
| Joneidys Viviana Ramírez Camacho | 19 | 1.69 | Santo Domingo | |
| Lorraine Ámbar Nova Espinal | 24 | 1.70 | San Francisco de Macorís | |
| Lizbeth del Isabel Santana Peralta | 22 | 1.79 | Santo Domingo | |
| María Isabel Leonidas de León Vargas | 17 | 1.81 | Santiago de los Caballeros | |
| Miriam Magdalena Cruz Tejeda | 22 | 1.68 | Santo Domingo | |
| Liliana Acosta Zamora | 23 | 1.86 | Santo Domingo | |