There are 6 US Post Offices in Wabaunsee County serving a total of 6,273 residents equating to 1,046 residents per post office. It's estimated that approximately 10,012 packages are handled across the 6 county post offices annually. Wabaunsee County (standard abbreviation: WB) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 7,053. Its county seat is Alma. The county was created by the territorial legislature of Kansas Territory on March 25, 1859, and was named for a chief of the Potawatomi Indians."