There are 9 US Post Offices in Wabash County serving a total of 33,020 residents equating to 3,669 residents per post office. It's estimated that approximately 52,704 packages are handled across the 9 county post offices annually. Wabash County is a county located in the U.S. state of Indiana. As of 2010, the population was 32,888. The county seat is Wabash."