Fort Ninigret is a historic fort and trading post site at Fort Neck Road in Charlestown, Rhode Island, built and occupied by European settlers in the seventeenth century. At its 1883 dedication, Commissioner George Carmichael, Jr. referred to it as "the oldest military post on the Atlantic coast."

Charlestown is a town in Washington County, Rhode Island, United States. The population was 7,997 at the 2020 census.