There are 5 US Post Offices in Langlade County serving a total of 17,990 residents equating to 3,598 residents per post office. It's estimated that approximately 28,714 packages are handled across the 5 county post offices annually. Langlade County is a county located in the U.S. state of Wisconsin. As of the 2010 census, the population was 19,977. Its county seat is Antigo. The county was created in 1879 and organized in 1881."