There are 3 US Post Offices in Kiowa County serving a total of 2,627 residents equating to 876 residents per post office. It's estimated that approximately 4,193 packages are handled across the 3 county post offices annually. Kiowa County (standard abbreviation: KW) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 2,553. The largest city and county seat is Greensburg."