There are 11 US Post Offices in Barron County serving a total of 44,571 residents equating to 4,052 residents per post office. It's estimated that approximately 71,140 packages are handled across the 11 county post offices annually. Barron County is a county located in the U.S. state of Wisconsin. As of the 2010 census, the population was 45,870. Its county seat is Barron. The county was created in 1859 and later organized in 1874."