Highway 123 (AR 123, Ark. 123, and Hwy. 123) is a designation for two state highways in Arkansas. One route begins at Salmon Lane in Boone County and runs 1.63 miles (2.62 km) north to US Highway 65 Business (US 65B) in Harrison. A second route begins at Highway 103 in Clarksville and runs 67.74 miles (109.02 km) northeast to US 65 and US 65B in Western Grove. A suffixed route, designated Highway 123Y runs near , giving non-truck travelers access to Highway 7. All three routes are maintained by the Arkansas Department of Transportation (ArDOT).