Celestún is a town in Yucatán, Mexico. It is located in the northwest corner of the state, just north of the border with the state of Campeche, on the Gulf of Mexico coast at 20°51.5′N 90°24′W. In 2000, it had a population of just under 6,000 people; however, the population swells to 10,000 during the octopus hunting season. It is mostly a fishing town, with a 19th-century lighthouse (as well as a more modern one) and an abandoned historic Hacienda. Besides fishing, Celestún also produces salt, as it has done from pre-Columbian times.