found: Wikipedia, August 3, 2019(Dallas, Oregon; city of Dallas is the county seat of Polk County, Oregon; settled in the 1840s on the north side of Rickreall Creek and was originally named "Cynthian" or "Cynthiana" [no access points in OCLC]. A 1947 Itemizer-Observer article states: "[T]he town was called Cynthiana after Cynthiana, Ky."; Dallas post office was established in 1852. In 1856, the town was moved more than a mile south because of an inadequate supply of water; Dallas was in competition with Independence to be the county seat and the citizens of Dallas raised $17,000 in order to have a branch of the narrow gauge railroad come to their town, thus securing the honor. The line was built from 1878-80. A more suitable name for a county seat was needed, and since George Mifflin Dallas was vice-president under James K. Polk, for whom the county was named, "Dallas" was a natural choice. Dallas was incorporated as a town in 1874, and as a city in 1901; 44°55ʹ16ʺN 123°18ʹ59ʺW)