Previously it was called Guaraguanó, a name from the Taíno, but in 1898, the President of the Republic at that time, Ulises Heureaux, assigned the name of Monción, in honor of the hero of the Dominican Restoration War, General Benito Monción. In 1907, Monción became the official municipality of the Monte Cristi Province. Then in 1948, when the Province of Santiago Rodríguez was created, it became its municipality. It is located specifically in the southwest part of the province.