The intention to form the municipality of Naranjito began in 1810. After a series of major incidents with powerful political interests of the time, on December 3, 1824, Don Braulio Morales successfully founded the town of Naranjito. The town was founded in the neighborhood of the same name, on a land donated by Doña Manuela Rivera and Don Braulio Morales. Morales was named "Captain Settler" and at the same time was appointed mayor of the town in development. The name "Naranjito" is derived from a small sour orange tree that served as a reference point for travelers looking for in the shortest way to the town of Toa Alta. At the time of its foundation, Naranjito consisted of five barrios/districts: Lomas, Guadiana, Achiote, Nuevo and Cedro. Cedro was divided in 1853 in Cedro Arriba and Cedro Abajo. The municipality's main urban zone is composed by the San Miguel, San Antonio and San Cristobal districts.