There are 7 US Post Offices in Pocahontas County serving a total of 6,632 residents equating to 947 residents per post office. It's estimated that approximately 10,585 packages are handled across the 7 county post offices annually. Pocahontas County is a county located in Iowa, United States. As of the 2010 census, the population was 7,310. The county seat is Pocahontas. The county was formed in 1851. This county was named after the Native American princess from Jamestown, Virginia. A colossal statue of her stands in the city."