|Oklahoma-New Mexico State Line
||After crossing the New Mexico state line, US Highway 56 begins its route in the state of Oklahoma. Concurrency with US Highways 64/412.
||Community of Felt, OK. Limited services.
|US Highway 385
||South to the Oklahoma-Texas state line. NOTE: Short concurrency with US Highway 56 to the north.
|Boise City, OK
||Community of Boise City, OK. Limited services.
|Oklahoma State Highways 325/3/US Highway 385
||OK State Highway 325 heads west-north-west to the community of Kenton, OK. - Black Mesa Oklahoma State Park (County Rd 325, Tel. 580-426-2222): nature preserve, hiking trails, wildlife viewing, campsites, picnic area, restrooms, playground, showers; open dawn-dusk. NOTE: US Highway 385 ends its overlap with US Highway 56, joins OK State Highway 3, and goes north to the Oklahoma-Colorado state line. OK State Highway 3 overlaps US Highway 56 to the east.
|US Highway 287
||North to the Oklahoma-Colorado state line. South to the Oklahoma-Texas state line.
|US Highways 64/412/Oklahoma State Highway 3
||NOTE: All 3 highways exit US Highway 56.
||Community of Keyes, OK. Limited services.
|Oklahoma State Highway 171
||South to the community of Griggs, OK (limited services) and the Oklahoma-Texas state line.
||Community of Sturgis, OK. Limited services.
|Oklahoma State Highway 95
||South to the community of Eva, OK and the community of Texhoma, OK (limited services) near the Oklahoma-Texas state line.
|Oklahoma-Kansas State Line
||End of US Highway 56's route in Oklahoma, USA, at the Oklahoma-Kansas state line. LD12e