Beallsville is a village in Monroe County, Ohio, United States. As of the 2000 census, the village population was 423. The village gained national attention during the Vietnam War by having lost six of its 475 citizens to the war, the worst per-capita loss of life experienced by any place in the country. Beallsville was the birthplace of Merriman Colbert Harris, a Civil War soldier and Methodist Episcopal Church Missionary Bishop. Beallsville is served by the Monroe County District Library from its administrative offices in Woodsfield, Ohio.