Rock Hill is an unincorporated community and census-designated place (CDP) in Grant Parish, Louisiana, United States.

[2] Rock Hill is located in southwestern Grant Parish along U.S. Route 71, which leads northwest 10 miles (16 km) to Colfax, the parish seat, and southeast 17 miles (27 km) to Alexandria.

According to the U.S. Census Bureau, the Rock Hill CDP has a total area of 3.9 square miles (10.0 km2), of which 0.004 square miles (0.01 km2), or 0.06%, is water.

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