Arkansas Highway 198 is the name of multiple state highways in Arkansas.

Arkansas Highway 198 is a state highway of 3.5 miles (5.6 km) that runs in Poinsett and Mississippi Counties.

AR 198 runs east from AR 140 to AR 77/AR 297. It does not cross or concur with any other state highways.

Arkansas Highway 198 is a state highway of 3.5 miles (5.6 km) that runs in Mississippi County.

AR 198 runs east from US 61 to Sans Souci Landing. It does not cross or concur with any other state highways.