West Union, Ohio 1.35

West Union is a village in Adams County, Ohio, United States. The population was 3,241 at the 2010 census. It is the county seat of Adams County.West Union is served by West Union High School, the Adams County/Ohio Valley School District, and the Adams County Public Library.HistoryWest Union was laid out in 1804. A post office called West Union has been in operation since 1805. The village was incorporated in 1859.GeographyWest Union is located at .According to the United States Census Bureau, the village has a total area of 2.83sqmi, all land.State Routes 41, 125, and 247 all intersect and run concurrently through the downtown area.Ironically, West Union lies east of Union, Ohio, a city in Montgomery County approximately 10 miles north of Dayton. West Union and Union are not adjacent to each other, actually being approximately 120 miles from each other.