Highway 128 (AR 128, Ark. 128, and Hwy. 128) is a designation for four east–west state highways in Southwest Arkansas. One route of 11.99 miles (19.30 km) begins at Highway 7 in Sparkman and runs east to Highway 9 at . A second route of 6.23 miles (10.03 km) begins at Highway 51 at and runs east to Highway 7/Highway 8 at . A third route begins at Highway 7 near DeGray Lake Resort State Park and runs east and north to US Highway 270 Business (US 270B) in Hot Springs. A fourth route begins at Highway 5 in Fountain Lake and runs east to US 70. All routes are maintained by the Arkansas Department of Transportation (ArDOT).