Fountain Inn is a city in Greenville and Laurens counties in the U.S. state of South Carolina. The population was 7,799 at the 2010 census, up from 6,017 in 2000. It is part of the Greenville–Mauldin–Easley Metropolitan Statistical Area.
The Cannon Building, Fairview Presbyterian Church, Fountain Inn High School, Fountain Inn Principal's House and Teacherage, McDowell House, Robert Quillen Office and Library, Tullyton, and F. W. Welborn House are listed on the National Register of Historic Places.
The southern part of the city is in Laurens County, while the bulk of the city is in Greenville County. The city's nickname is "The Diamond Tip of the Golden Strip". The city took its name from an inn and fountain that were along the old stagecoach route. The stagecoach drivers called the stop "Fountain Inn", and it stuck. A small garden fountain is installed at City Hall, and there is a marker on the north side of town showing the former location of the old inn.
South Carolina Highway 14 runs through the center of town as Main Street, and Interstate 385 runs along the southern edge of the city, with access from Exits 22, 23, and 26. Greenville is 17 miles (27 km) to the northwest, and Columbia is 84 miles (135 km) to the southeast.