There are 8 US Post Offices in Campbell County serving a total of 83,792 residents equating to 10,474 residents per post office. It's estimated that approximately 133,741 packages are handled across the 8 county post offices annually. Campbell County is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 90,336. Its county seats are Alexandria and Newport. The county was formed on December 17, 1794, from sections of Scott, Harrison, and Mason Counties and was named for Colonel John Campbell (1735\u20131799), a Revolutionary War soldier and Kentucky legislator. Campbell County is part of the Cincinnati-Middletown, OH-KY-IN Metropolitan Statistical Area."