Franklin County is a county located in the Blue Ridge foothills of the Commonwealth of Virginia. As of the 2020 census, the population was 54,477. Its county seat is Rocky Mount. Franklin County is part of the Roanoke Metropolitan Statistical Area and is located in the Roanoke Region of Virginia. The Roanoke River forms its northeast boundary …Franklin County is a county located in the Blue Ridge foothills of the Commonwealth of Virginia. As of the 2020 census, the population was 54,477. Its county seat is Rocky Mount. Franklin County is part of the Roanoke Metropolitan Statistical Area and is located in the Roanoke Region of Virginia. The Roanoke River forms its northeast boundary with Bedford County.