Columbia County, Arkansas

Columbia County is a county located in the U.S. state of Arkansas. As of the 2010 census, the population was 24,552. The county seat is Magnolia. The county was formed on December 17, 1852, and was named for Christopher Columbus. The Magnolia, AR Micropolitan Statistical Area includes all of Columbia County.GeographyAccording to the U.S. Census Bureau, the county has a total area of, of which is land and (0.1%) is water. Columbia County is in South Arkansas. Columbia County, along with Union County, is home to the largest Bromine reserve in the United States.Dorcheat Bayou flows through Columbia County from its origin in Nevada County southward into Webster Parish, Louisiana, before emptying into Lake Bistineau.Adjacent counties Nevada County (north) Ouachita County (northeast) Union County (east) Claiborne Parish, Louisiana (southeast) Webster Parish, Louisiana (south) Lafayette County (west)