List of state highways in Oklahoma

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Highway markers for State Highways 3, 51, and 152
Map showing Oklahoma's numbered highways
Highway names
Interstates	Interstate nn (I-nn)
US Highways	U.S. Highway nn (US nn)
State	State Highway nn (SH-nn)
System links
Oklahoma State Highway System Interstate US State Turnpikes

Oklahoma has a large network of numbered highways maintained by the state. These roads fall into one of three categories: Interstate Highways, U.S. Highways, and state highways. Interstate and U.S. Highways are continuous with surrounding states, while state highways are not (though Oklahoma and another state's department of transportation may coordinate numbering).

The majority of the numbered highways within Oklahoma are maintained by the Oklahoma Department of Transportation (ODOT). The only exceptions are sections of Interstate 44 (I-44) and U.S. Highway 412 (US 412), which run along turnpikes maintained by the Oklahoma Turnpike Authority (OTA). (I-44 runs along the H.E. Bailey, Turner, and Will Rogers turnpikes; US 412 is signed along the Cimarron and Cherokee turnpikes.)

Individual counties may establish a numbering system to apply to roads that they maintain. These highways are not listed here.