There are 7 US Post Offices in Vanderburgh County serving a total of 134,211 residents equating to 19,173 residents per post office. It's estimated that approximately 214,216 packages are handled across the 7 county post offices annually. Vanderburgh County is a county located in the U.S. state of Indiana. As of 2010, the population was 179,703. The county seat is in Evansville. While Vanderburgh County was the seventh largest county in 2010 population with 179,703 people, it is also the eighth smallest county in area in Indiana and the smallest in Southwestern Indiana, covering only 236 sq mi. In 2012, the population was 180,835. Vanderburgh County forms the core of the Evansville Metropolitan Statistical Area."