Benton is a city in Marshall County, Kentucky, United States. The population was 4,197 at the 2000 census. It is the county seat of Marshall County. Shape-note singers gather annually at Benton on the fourth Sunday in May to sing from a tunebook called The Southern Harmony. This event, organized in 1884 and called The Big Singing or Big Singing Day, is considered by many to be the oldest indigenous musical tradition in the United States. Benton is also known for an annual festival called "Tater Day," which attracts residents from all over the Jackson Purchase and involves games, deep fried food, and a parade.