Lagunas de Chacahua National Park, National park with lagoon system on Pacific coast in Oaxaca, Mexico.

Lagunas de Chacahua is a national park in the municipality of Villa de Tututepec, Oaxaca, about 54 km west of Puerto Escondido. It covers 132.73 km², of which roughly 30 km² are lagoons such as Chacahua, La Pastoria and Las Salinas, linked by narrow channels; the rest is dry land. A long wooden pier on paired posts crosses the water, and low grey-brown landmasses rise from pale tan flats.

The Mexican government protected the area in 1937 to conserve its wetlands and lagoon systems. This early designation established its role as a protected ecosystem on the Pacific coast.

The name Chacahua comes from Mixtec and means "place where shrimp abound." The park was founded by Mexican-African communities, who are thought to have originally spoken Nahuatl before the language faded over the years. Boat tours often stop so visitors can sample local food.

The park is most easily accessed from Puerto Escondido, with transport to Zapotalito followed by a boat ride through the lagoons. The drier months offer easier navigation through the waterways and better viewing conditions.

The name Chacahua comes from Mixtec and means "place where shrimp abound". The park was founded by Mexican-African communities who are thought to have originally spoken Nahuatl, a language lost over the years. It was Mexico's first protected area decreed for tropical ecosystems, on 9 July 1937 by President Lázaro Cárdenas.