Jacinto del Rosario de Castro (August 15, 1811 – November 13, 1896) was a politician from the Dominican Republic.

He was baptized on August 27 of that same year in the Cathedral of Santo Domingo with the name of Jacinto del Rosario de Castro.

A lawyer by profession, he lived in Baní, where he took an active part in the actions of the Dominican War of Independence.

He was a founding member in 1846 of the patriotic society Friends of the Country, however, in 1861, he supported the annexation to Spain.

Upon assuming the Presidency, Jacinto de Castro organized a Provisional Government until elections were held to choose the new Head of State.