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 . In 2000, it had a population of just under 6,000 people; however, the population swells to 10,000 during the octopus hunting season.
Surrounding the town is the 147,500-acre (600 km²) Parque Natural del Flamenco Mexicano(also known as the “Celestun Biosphere Reserve”), a wetland reserve that is the winter home to vast flocks of flamingos, as well as many herons and other bird species. This location is set within the Petenes mangroves ecoregion. In addition, more than 200 species of birds pass through on migration, or live there. Celestun’s ecosystem is unique because of a combination of fresh water from the estuary and salt water from Gulf of Mexico. The reserve also has two types of pelicans – large white Canadian and smaller gray Mexican ones. Celestun is also known as a hatching ground for endangered sea turtles. Wildlife conservationists have an ongoing project to protect the sea turtles from encroaching modernization.