There are 8 US Post Offices in Boone County serving a total of 136,322 residents equating to 17,040 residents per post office. It's estimated that approximately 217,585 packages are handled across the 8 county post offices annually. Boone County is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 118,811, making it the fourth-most populous county in Kentucky. Its county seat is Burlington. The county was formed in 1798 from part of Campbell County. and was named for frontiersman Daniel Boone. Boone County is part of the Cincinnati-Middletown, OH-KY-IN Metropolitan Statistical Area. It is the location of the Cincinnati/Northern Kentucky International Airport, which serves Cincinnati and the tri-state area and was the former headquarters of Comair."