There are 6 US Post Offices in Barber County serving a total of 4,599 residents equating to 767 residents per post office. It's estimated that approximately 7,341 packages are handled across the 6 county post offices annually. Barber County (county code BA) is a county located in the south-central portion of the U.S. state of Kansas. As of the 2010 census, the county population was 4,861. Its county seat and most populous city is Medicine Lodge. It was named for Thomas Barber, an abolitionist who was killed in Douglas County in 1855 during the Wakarusa War."