There are 8 US Post Offices in Crawford County serving a total of 15,951 residents equating to 1,994 residents per post office. It's estimated that approximately 25,460 packages are handled across the 8 county post offices annually. Crawford County is a county in the southwest part of the U.S. state of Wisconsin. As of the 2010 census, the population was 16,644. Its county seat is Prairie du Chien.