The Petenes mangroves ecoregion (WWF ID: NT1428) covers mangrove habitat along the Gulf of Mexico coast of southern Mexico, where Campeche state and Yucatan state meet, centering on the Celestun Lagoon inland from the barrier-island town of Celestún.

Because the region has relatively little rainfall and no rivers feeding the lagoons, the freshwater to support the mangrove ecosystem springs from underground aquifers.

The ecoregion stretches along 150 km of coastal, from the town of Campeche City to Sisal, Yucatán.

The coast along the western side of the Yucatan peninsula is within the Los Petenes Biosphere Reserve.

Associated species include swamp sawgrass (Cladium jamaicensis), southern cattail (Typha domingensis), dwarf saltwort (Salicornia bigelovii), and beachwort (Batis maritima).