Arkansas Highway 9 is a designation for two state highways in east Arkansas. The northern segment of 174.17 miles (280.30 km) runs from AR 5 to U.S. Route 63 in Mammoth Spring. A southern segment of 51.09 miles (82.22 km) begins at U.S. Route 79 at Eagle Mills and heads north to U.S. Route 67 in Malvern before terminating.

AR 9 begins at Crows and runs north, with AR 298 shooting east from the route. Continuing north into Perry County, AR 9 meets AR 10 at Williams Junction with AR 216 detaching near Harris Rake. The route next meets AR 60 in Perryville before entering Conway County. The route runs with AR 113 and AR 247 briefly south of Morrilton before meeting US 64 and I-40. AR 9 has a spur and business route in Morrilton. AR 915 strays from AR 9 near Overcup Lake. AR 9 also runs with AR 92 from Birdtown to Center Ridge in Conway County. AR 9 concurs with US 65 from Choctaw to Clinton. The route continues to Shirley from Clinton with AR 16, where it is crossed by AR 110. Entering Stone County, AR 9 runs north for several miles before meeting AR 66 in Mountain View. It exits town northbound with AR 5 and AR 16. AR 9 arrows east in Izard County, passing AR 933, a former alignment of AR 9. The route mostly follows the White River in eastern Izard County. AR 9 detaches a spur route and meets AR 69 in Melbourne. The route then meets AR 56 in Brockwell before leaving the county. The route enters its final county, meeting AR 395 before meeting US 62/US 412 and US 62 BUS in Salem. The route trails northeast to Mammoth Spring, where it meets US 63 and terminates, near the Missouri state line.

Highway 9 begins at US 67 in Malvern and heads south through Lono, Tulip, and Princeton before heading slightly west. The route then passes through Holly Springs and past numerous quarries before terminating at US 79 at Eagle Mills.

Arkansas Highway 9 Spur is a spur route of 0.90 miles (1.45 km) in Melbourne. It is known colloquially as Main Street.

Arkansas Highway 9 Spur is a spur route of 0.47 miles (0.76 km) in Morrilton.

Arkansas Highway 9 Business is a business route of 2.22 miles (3.57 km) in Morrilton.