There are 6 US Post Offices in Kingfisher County serving a total of 16,274 residents equating to 2,712 residents per post office. It's estimated that approximately 25,975 packages are handled across the 6 county post offices annually. Kingfisher County is a county located in the U.S. state of Oklahoma. As of the 2010 census, the population was 15,034. Its county seat is Kingfisher. The county was formed in 1890 and named Kingfisher by a vote of residents. The land was given to the Creek Nation by the federal government, but was taken back after the American Civil War."