There are 6 US Post Offices in Pickaway County serving a total of 52,352 residents equating to 8,725 residents per post office. It's estimated that approximately 83,560 packages are handled across the 6 county post offices annually. Pickaway County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 55,698. Its county seat is Circleville. Its name derives from the Pekowi band of Shawnee Indians, who inhabited the area. (See List of Ohio county name etymologies.) Pickaway County is part of the Columbus, OH Metropolitan Statistical Area."