Fort Wetherill is a former coast artillery fort that occupies the southern portion of the eastern tip of Conanicut Island in Jamestown, Rhode Island. It sits atop high granite cliffs, overlooking the entrance to Narragansett Bay. Fort Dumpling from the American Revolutionary War occupied the site until it was built over by Fort Wetherill. Wetherill was deactivated and turned over to the State of Rhode Island after World War II and is now operated as Fort Wetherill State Park, a 51-acre (210,000 m2) reservation managed by the Rhode Island Department of Environmental Management.