Beltrán de Cetina y del Castillo (Alcalá de Henares, 1521 – Mérida de Yucatán, 1600?) was one of the original conquistadors and founders of Mérida in the modern Mexican state of Yucatán. His siblings included: Renaissance poet Gutierre de Cetina; Ana Andrea del Castillo, self-described conquistadora and wife of Francisco de Montejo the Younger; and Gregorio de Cetina, also a conqueror of Yucatán.