There are 5 US Post Offices in Mccracken County serving a total of 96,293 residents equating to 19,259 residents per post office. It's estimated that approximately 153,694 packages are handled across the 5 county post offices annually. McCracken County is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 65,565. The county seat and only municipality is Paducah. McCracken County was the 78th county formed, having been created in 1825. McCracken County is part of the Paducah, KY-IL Micropolitan Statistical Area. It is part of the Jackson Purchase, located at the extreme western end of Kentucky."