Washington County, NC adjoins Tyrrell near Plymouth metropolitan centre yielding a 2020 estimated population standing of 13,406 making it the 97th most populous county located in North Carolina overall. Its county seat is Plymouth although other towns include Roper & Stonewall- Plymouth itself corresponds out to Washington’s largest city aside from noted country seat. This area had been established from Tyrrell and Martin Counties back in 1799 when local citizens petitioned for new administrative boundaries - posthumously named after George Washington American statesman who served as Commander In Chief During Period John Adams .