Narragansett is a town in Washington County, Rhode Island, United States. The population was 15,868 at the 2010 census, but there is a greater population in the summer. The nickname for the town is 'Gansett.' The town of Narragansett occupies a narrow strip of land running along the eastern bank of the Pettaquamscutt River to the shore of Narragansett Bay. It was separated from South Kingstown in 1888, and incorporated as a town in 1901.