There are 9 US Post Offices in Nelson County serving a total of 45,282 residents equating to 5,031 residents per post office. It's estimated that approximately 72,275 packages are handled across the 9 county post offices annually. Nelson County is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 43,437. Its county seat is Bardstown. Nelson County comprises the Bardstown, KY Micropolitan Statistical Area, which is also included in the Louisville/Jefferson County-Elizabethtown-Madison, KY-IN Combined Statistical Area."