Graves County is a county located on the southwest border of the U.S. Commonwealth of Kentucky. As of the 2020 census, the population was 36,649. Its county seat is Mayfield. The county was formed in 1824 and was named for Major Benjamin Franklin Graves, a politician and fallen soldier in the War of 1812. Graves County comprises the Mayfield, KY Micropolitan Statistical Area, which is included in the Paducah-Mayfield, KY-IL Combined Statistical Area.