Onorato Caetani (17 December 1742 - 26 June 1797) was an Italian scholar who was Principal of the Accademia degli Incolti in Rome in 1762.
The academy was an institution founded by the Nazareno College originally dedicated to promoting a coherent balanced education.
He studied the classics at the Nazareno College in addition to mathematics, physics and foreign languages and in 1764 graduated from the Sapienza University of Rome.
Between 1765 and 1772 he was Regent of the chancellery and in the latter year Pope Clement XIV named him a non-participating apostolic protonotary.
He commissioned the Swiss painter Angelika Kauffmann to paint two canvasses on subjects inspired by episodes of the novel The Adventures of Telemachus by François Fénelon.