Rolette County, ND neighbors Cavalier near Rolla metropolitan centre thus granting a 2020 estimated census population standing of 13,881 making it the 3rd most populous county located in North Dakota overall. Its county seat is Rolla with other cities include Dunseith & Belcourt-Rolla itself equates out to Rolette's largestcity aside from acknowledged country seat. This area had been established out of Pembina and Walsh Counties back in 1884 when local citizens petitioned for new administrative boundaries - posthumously named after New France trapper Joseph La Rolette living through region prior era Chester Arthur .