Ninigret is a coastal lagoon in Charlestown, Rhode Island, in the United States, located at 41°22′45″N 71°38′43″W. It is the largest of the nine lagoons, or "salt ponds", in southern Rhode Island. It is utilized for recreational actives, as well as oyster and quahog harvesting. Found along its shores are "extensive" archaeological remains. Ninigret Pond, like others in the region, was "formed after the recession of the glaciers 12,000 years ago".