Melchor de Navarrete y Bujanda (1693–1761) was a Spanish soldier and administrator who served as governor of Cartagena de Indias, Colombia, from 1739 to 1742; of Spanish Florida from 1749 to 1752; and of Yucatán, Mexico, from 1754 to 1758.
He was linked to several cases of corruption in Cartagena.