There are 9 US Post Offices in Dubois County serving a total of 42,123 residents equating to 4,680 residents per post office. It's estimated that approximately 67,233 packages are handled across the 9 county post offices annually. Dubois County (/du\u02d0\u02c8b\u0254\u026az/ doo-BOYZ) is a county located in the U.S. state of Indiana. As of 2010, the population was 41,889. The county seat is Jasper. Dubois County is part of the Jasper Micropolitan Statistical Area."