There are 14 US Post Offices in Waupaca County serving a total of 59,944 residents equating to 4,282 residents per post office. It's estimated that approximately 95,677 packages are handled across the 14 county post offices annually. Waupaca County is a county in the U.S. state of Wisconsin. As of the 2010 census, the population was 52,410. The county seat is Waupaca. The county was created in 1851 and organized in 1853. It is named after the Waupaca River, a Native American name meaning 'white sand bottom', 'pale water', or 'tomorrow river'."