Horrel Hill is an unincorporated community in Lower Richland County, South Carolina, United States. Situated south of Fort Jackson and northwest of McEntire Joint National Guard Base, it is centered at approximately the intersection of Garner's Ferry Road (U.S. Route 76/378) and Harmon Road/Horrel Hill Road (SC 86). Congaree Road (SC 769) meets Garner's Ferry Road about 120 meters to the east.