There are 8 US Post Offices in Cherokee County serving a total of 11,935 residents equating to 1,492 residents per post office. It's estimated that approximately 19,050 packages are handled across the 8 county post offices annually. Cherokee County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 12,072. The county seat is Cherokee. The county was formed on January 15, 1851 from open territory. It was named after the Cherokee Indians."