Lagoa do Jequiá is a coastal lagoon located in the municipality of Jequiá da Praia, in the state of Alagoas, Brazil. It forms where the Jequiá River spreads across the coastal plain just before emptying into the Atlantic Ocean. The lagoon and its surrounding waters are encompassed within the Lagoa do Jequiá Marine Extractive Reserve, a federally protected area of 10,231 hectares administered by the Chico Mendes Institute for Biodiversity Conservation and established in 2002. The reserve carries an IUCN Category VI designation, meaning it is managed for the sustainable use of natural resources, with local fishing communities playing a central role in the area.

Because the lagoon sits within a protected extractive reserve, paddlers should be aware that activities are subject to the regulations governing this conservation unit. Access to the area around the lagoon involves entry fees, and at least part of the surrounding land is managed as a private natural reserve associated with Praia do Gunga. Prospective visitors should confirm current access arrangements and any restrictions on recreational watercraft before planning a trip.

The setting includes cliffs along the shoreline and the lagoon hosts a population of flamingos and other colorful bird species, making it of interest to wildlife observers on the water. The reserve also protects the Jequiá River corridor down to its mouth, so paddlers may find it possible to explore the river channel as well as the lagoon itself, though the transition zone where the lagoon meets the Atlantic should be approached with appropriate caution given coastal conditions typical of this stretch of the northeastern Brazilian coast.