South Fork
- Big South Fork National River and Recreation Area
- Big South Fork of the Cumberland River
- South Fork (community), Wisconsin
- South Fork American River
- South Fork Dam
- South Fork Eel River
- South Fork Fishing and Hunting Club
- South Fork Grand River (South Dakota)
- South Fork High School
- South Fork Holston River
- South Fork John Day River
- South Fork Musselshell River
- South Fork Rio Grande
- South Fork Shenandoah River
- South Fork Spring River
- South Fork Township (disambiguation)
- South Fork Trinity River
- South Fork, Butte County, California
- South Fork, Colorado
- South Fork, Madera County, California
- South Fork, Mendocino County, California
- South Fork, Missouri
- South Fork, Nevada
- South Fork, Pennsylvania
- South Fork, Saskatchewan
- South Fork, Suffolk County, New York
- South Fork, Wisconsin
- Southfork (disambiguation)
