Niumi National Park, located in The Gambia's North Bank Region, spans 4,940 hectares along the southern edge of the Sine-Saloum Delta. The park features diverse coastal ecosystems, including Rhizophora mangrove forests, freshwater marshes, sand spits, and brackish lagoons. Established in 1986, it protects vulnerable species such as the green sea turtle, humpback dolphin, and West African manatee, alongside populations of patas monkeys and warthogs. Recognized as an Important Bird Area, the park hosts over 200 bird species, including wintering slender-billed gulls and large flocks of roseate terns along the Atlantic coast. Jinack Island and surrounding islets form part of its northern section.