There are 11 US Post Offices in Monroe County serving a total of 17,843 residents equating to 1,622 residents per post office. It's estimated that approximately 28,479 packages are handled across the 11 county post offices annually. Monroe County is a county located in the U.S. state of West Virginia. As of the 2010 census, the population was 13,502. Its county seat is Union. Monroe County was created from Greenbrier County in 1799 and was named for James Monroe who eventually became the fifth President of the United States. Monroe County was the home of Andrew Summers Rowan of Spanish\u2013American War fame, who is immortalized in Elbert Hubbard's classic A Message to Garcia. The county was also the site of the 1928 discovery of the 34.48 carat (6.896 g) Jones Diamond by Grover C. Jones and his son, William \"Punch\" Jones. Monroe County celebrates its own holiday, Farmers' Day, and is known for its close community."