Arkansas Highway 37 is a designation for two state highways in Arkansas. The main segment of 52.40 miles (84.33 km) runs from McCrory to Cord. A short segment of 0.61 miles (0.98 km) runs north in Benton County from U.S. Route 62 to the Missouri state line.
Arkansas Highway 23 is a north–south state highway in north Arkansas. The route runs 129.88 miles (209.02 km) from US 71 near Elm Park north to the Missouri state line through Ozark and Eureka Springs. Between AR 16 at Brashears and Interstate 40 north of Ozark, Highway 23 winds through the Ozark National Forest and is designated as the Pig Trail Scenic Byway due to its steep hills and hairpin turns. The route has a strong connection with the University of Arkansas Razorbacks, connecting fans in Central Arkansas with the Northwest Arkansas area.
Arkansas Highway 59 is a north–south state highway in Northwest Arkansas. The route runs 93.24 miles (150.06 km) from Arkansas Highway 22 in Barling north to the Missouri state line through Van Buren, the county seat of Crawford County. Highway 59 parallels US 59 between Siloam Springs and Fort Smith. Since US 59 goes through Arkansas, AR 59 is the only Arkansas state highway to share its numbering with a federal highway that goes through Arkansas.
Arkansas Highway 12 is an east–west state highway in Northwest Arkansas. The route runs 56.60 miles (91.09 km) from Oklahoma State Highway 116 near Cherokee City east to Arkansas Highway 23 near Clifty.
Highway 321 is a designation for two north–south state highways in central Arkansas. One route of 11.20 miles (18.02 km) runs from Highway 5/Highway 367 in Cabot north to Highway 38 east of Austin. A second route of 3.79 miles (6.10 km) begins at AR 31 north of Beebe and runs north to Highway 267.
Highway 9 is a designation for two north–south state highways in Arkansas. A southern segment of 51.44 miles (82.78 km) begins at U.S. Route 79 at Eagle Mills and heads north to U.S. Route 67 in Malvern before terminating. The northern segment of 174.17 miles (280.30 km) runs from AR 5 to U.S. Route 63 in Mammoth Spring. The route was created during the 1926 Arkansas state highway numbering, and has seen only minor extensions and realignments since. Pieces of both routes are designated as Arkansas Heritage Trails for use during the Civil War and the Trail of Tears.
Highway 160 is a designation for four state highways in South Arkansas. The northernmost segment of 51.55 miles (82.96 km) runs from Farm to Market Road 249 at the Texas state line near Bloomburg, Texas east to Highway 19 at Macedonia. A second segment of 14.73 miles (23.71 km) runs east from Highway 57 east to Highway 7 Business in Smackover. In southern Calhoun County, Highway 160 begins at US Route 278 (US 278) and runs east to US 425 in Fountain Hill. A fourth segment begins at US 82 and runs 22.73 miles (36.58 km) east to US 65 at Chicot Junction.
Highway 4 is a designation for two state highways in Arkansas. The western segment of 2.99 miles (4.81 km) runs from SH-4 at the Oklahoma state line and terminates in Cove. An eastern segment of 22.49 miles (36.19 km) begins at U.S. Route 278 (US 278) in McGehee and heads east to Arkansas City then north to Highway 1 before terminating. The two routes were formerly connected until a portion of approximately 230 miles (370 km) was redesignated US 278 in 1998. The eastern segment is part of the Great River Road.
Arkansas Highway 264 is a designation for three state highways in Benton County, Arkansas. The eastern route begins at US 71B and runs 7.75 miles (12.47 km) east to terminate at Beaver Lake. At 13.15 miles (21.16 km), the Highfill to Lowell route is the longest alignment. The westernmost routes runs 2.73 miles (4.39 km) in Siloam Springs.
Arkansas Highway 280 is a state highway in Clay and Greene Counties. The route runs 5.85 miles (9.41 km) from Arkansas Highway 90 near Delaplaine north then east to AR 90 in Peach Orchard. It does not intersect any other state highways.
Arkansas Highway 374 is the designation for multiple state highways in Arkansas.
Highway 18 is an east–west state highway of 93.43 miles (150.36 km) in Northeast Arkansas. It has concurrency with U.S. Route 78 (US 78) much of its length.
Arkansas Highway 124 is a designation for two state highways in Central Arkansas. The western segment of 72.17 miles (116.15 km) runs from Russellville to Rose Bud. An eastern segment of 9.17 miles (14.76 km) runs east in White County from Pangburn to AR 157.
Arkansas Highway 331 is a north–south state highway in Pope County, Arkansas. The route runs 5.28 miles (8.50 km) from Arkansas Highway 247 in Pottsville north across Interstate 40 to terminate at the northbound ramps.
Arkansas Highway 29 is a state highway that extends 77.2 miles (124.2 km) in South Arkansas. It runs north from the Louisiana state line to its terminus at AR 301 in Antoine. It is intersected by many major thoroughfares including Interstate 30. Part of the highway is known as Bill Clinton Drive.
Arkansas Highway 107 is the name of multiple state highways in Arkansas.
Arkansas Highway 15 is the designation for two state highways in Arkansas. The northern segment of 34.45 miles (55.44 km) runs from Altheimer north across Interstate 40 to Furlow. The southern segment of 21.10 miles (33.96 km) is entirely in Union County, and runs from Louisiana Highway 161 north to U.S. Route 82 in El Dorado.
Arkansas Highway 35 is a northwest–southeast state highway in southeast Arkansas. The route runs 115.83 miles (186.41 km) from Dewey near the Mississippi River northwest to Arkansas Highway 5 in Benton.
Three auxiliary routes of Arkansas Highway 18 exist in Northeast Arkansas, with one former alignment.
Highway 39 is a designation for two state highways in southeast Arkansas. The western segment of 9.98 miles (16.06 km) runs from US Route 49 (US 49) at Blackton to US 49/Highway 241. Another segment of 8.89 miles (14.31 km) runs north from Highway 1 and Highway 316 near Turner to US 49 in rural Phillips County.
