There are 7 US Post Offices in Hancock County serving a total of 73,067 residents equating to 10,438 residents per post office. It's estimated that approximately 116,623 packages are handled across the 7 county post offices annually. Hancock County is a county located in the U.S. state of Indiana. As of 2010, the population was 70,002. The county seat is Greenfield. Hancock County is included in the Indianapolis-Carmel-Anderson, IN Metropolitan Statistical Area"