Grayson is a home rule-class city in and the county seat of Carter County, Kentucky, United States, on U.S. Route 60 and Interstate 64 in the state's northeastern region. It is approximately 21 miles west of Ashland. Within the city limits, the population was 4,217 at the 2010 census. Along with Carter County, the city is closely associated with the nearby Huntington-Ashland, WV-KY-OH Metropolitan Statistical Area and is often erroneously included in the MSA being just 9 miles west of the M.S.A's western boundary.

Carter County is a county located in the U.S. state of Kentucky. As of the 2020 census, the population was 26,627. Its county seat is Grayson. Carter County is in the Huntington-Ashland, WV-KY-OH Metropolitan Statistical Area. It is home to Carter Caves State Resort Park.