South Carolina Highway 9 (SC 9) is a 259.570-mile (418 km) major state highway in the U.S. state of South Carolina. The highway travels from Cherry Grove Beach to the North Carolina state line upstate. The highway is currently the longest state highway in South Carolina. It is signed as a north–south highway, even though it travels in an east–west direction.

Spartanburg is a city in and the seat of Spartanburg County, South Carolina, United States. The city had a population of 38,732 as of the 2020 census, making it the 11th-most populous city in the state. For a time, the Office of Management and Budget (OMB) grouped Spartanburg and Union counties together as the Spartanburg, SC Metropolitan Statistical Area, but the OMB now defines the Spartanburg, SC MSA as only Spartanburg County.