Highway 198 (AR 198, Ark. 198, and Hwy. 198) is a designation for three state highways in the Upper Arkansas Delta. One route of 2.45 miles (3.94 km) in Trumann runs from Highway 69 east to Highway 463. A second route of 2.70 miles (4.35 km) connects Highway 140 and Highway 77. A third route of 3.38 miles (5.44 km) runs from US Highway 61 (US 61) near east to the Sans Souci Landing on the Mississippi River. All routes are maintained by the Arkansas State Highway and Transportation Department (AHTD).