There are 14 US Post Offices in Knox County serving a total of 24,313 residents equating to 1,737 residents per post office. It's estimated that approximately 38,806 packages are handled across the 14 county post offices annually. Knox County is a county located near the southeastern corner of the U.S. state of Kentucky. As of the 2010 census, the population was 31,883. Its county seat is Barbourville. The county is named for General Henry Knox. Knox County is included in the London, KY Micropolitan Statistical Area. Knox County is a prohibition or dry county, with the exception of the portion of the city of Corbin that lies within Knox County. The city had voted in 2006 to allow sales of alcohol by the drink in qualifying restaurants, and then approved full retail sales in 2012. It is one of the few coal-producing counties in Kentucky not to experience massive population loss."