There are 4 US Post Offices in Schuyler County serving a total of 6,705 residents equating to 1,676 residents per post office. It's estimated that approximately 10,702 packages are handled across the 4 county post offices annually. Schuyler County is a county located in the U.S. state of Illinois. According to the 2010 census, it had a population of 7,544. Its county seat is Rushville."