His mother was Dominican and father - Puerto Rican.
Mr. de la Renta was born on July 22, 1932, in Santo Domingo, Dominican Republic. Born to a Dominican mother, Carmen María Antonia Fiallo, and a Puerto Rican father, Óscar Avelino De La Renta, owner of an insurance company, he was the only son of seven children, it is believed that this experience, along with his success, may have contributed to his understanding of women's fashion. His mother died from complications of multiple sclerosis when he was 18.
He belonged to a family of poets, scholars, mayors and highly successful individuals. Their origin in the island can be traced back to the foundation of San Carlos de Tenerife in 1685 by Canarian settlers. A maternal uncle, Luis Arístides Fiallo Cabral, was a doctor, lawyer, and architect, who received every degree the University of Santo Domingo could offer. Another maternal uncle, Fabio Fiallo, was a diplomat and poet. On his father's side, De la Renta's great-great grandfather José Ortíz de la Renta was the first mayor of Ponce, Puerto Rico, elected by popular vote and who had the distinction of serving as mayor eight times, the most ever for the city.