High Quality Content by WIKIPEDIA articles! The Cummins Unit (formerly known as Cummins State Farm) is an Arkansas Department of Correction prison in Grady, Arkansas, United States. It is located along U.S. Route 65, near Grady,Gould, and Varner, 28 miles (45 km) south of Pine Bluff, and 60 miles (97 km) southeast of Little Rock.