"I intend to come and work in the Dominican Republic," Vargas Llosa, 87, said at Santo Domingo's presidential palace, alongside President Luis Abinader.
He said he hoped to "spend a period of elation and real accomplishment" in the Dominican Republic.
"I asked him, because of his decision to spend a lot of time in the country, to accept Dominican citizenship and he accepted it," Abinader told reporters.
"The Goat Party", a novel published in 2000, tells the story of life in the Dominican Republic under the dictatorship of the aging Rafael Leonidas Trujillo (1930-1961).
The author of "The City and the Dogs" or "Tours and Detours of the Naughty Girl" received in 2016 the Pedro Henriquez Ureña International Prize for Literature, awarded by the Dominican government.
The recognition sparked protests from conservative groups that called him an "enemy" of the country for his criticism of migration policies toward Haitian citizens with whom the Dominican Republic shares the island of Hispaniola.
In an article published on 3 November 2013 in the Spanish daily El Pais, entitled "The Outcasts of the Caribbean", Vargas Llosa described as a "legal aberration" a 2013 Dominican court decision denying citizenship to descendants of undocumented immigrants born between 1929 and 2013.
Vargas Llosa in February became the first non-French-language author to enter the Académie française, founded in 1635.
© 2023 AFP