The documentation about the history of San Jerónimo is fortunately very abundant, detailed, and reliable, as this is one of the historically most important municipalities in the department of Antioquia. Before the
Spanish conquerors arrived in this region, broadly speaking, and particularly before reaching the neighboring valley of
Ebéjico, it was populated by indigenous tribes of the Ebéjicos and Peques, both part of the
Nutabes indigenous people. When the Spaniards arrived, they gave several names to the place, the first being San Juan del Pie de la Cuesta, which was changed only a year later to San Jerónimo de los Cedros, all this approximately between 1613 and 1616. San Juan del Pie de la Cuesta was actually a vast territory personally owned by the governor of the province, Don Gaspar de Rodas. These properties changed owners several times, being bought and sold for around fifty pesos of the time. As time passed, by 1757, the Antioquia government created by decree the party of San Jerónimo de los Cedros, a date considered official as the founding of the municipality. In 1791, this locality saw the birth of the hero
Atanasio Girardot, a hero of Colombia and the
Independence of Venezuela. == Geography ==