The towns of South Kingstown, North Kingstown, New Shoreham, Westerly, Charlestown, Exeter, Richmond, Hopkinton, and Narragansett, shall constitute the county of Washington; and South Kingstown shall be the county town.
Washington County
R.I. Gen. Laws § 42-3-3., under Chapter 42-3 Counties.
R.I. Gen. Laws § 42-3-3.