Alvordton is a census-designated place in central Mill Creek Township, Williams County, Ohio, United States. The population was 200 at the 2020 census. Alvordton had its start when the railroad was extended to that point. Alvordton was platted in 1881 by Henry D. Alvord, and named for him. A post office has been in operation at Alvordton since 1881. Th…Alvordton is a census-designated place in central Mill Creek Township, Williams County, Ohio, United States. The population was 200 at the 2020 census. Alvordton had its start when the railroad was extended to that point. Alvordton was platted in 1881 by Henry D. Alvord, and named for him. A post office has been in operation at Alvordton since 1881. The community incorporated as a village in 1891. Municipal status continued until 2007, when voters overwhelmingly approved a measure to disincorporate. In 2010, the U.S. Census Bureau listed Alvordton as a census-designated place.