Oklahoma State Highway 51

State Highway 51
Route information
Maintained by ODOT
Length	332.8 mi (535.6 km)
Existed	June 1, 1927–present
Major junctions
West end	US 60 at Texas state line
Major intersections	I-35 in Orlando I-244 in Tulsa I-444 in Tulsa I-44 in Tulsa Muskogee Turnpike in Broken Arrow
East end	AR 244 at the Arkansas state line
Location
Country	United States
State	Oklahoma
Counties	Ellis, Dewey, Blaine, Kingfisher, Logan, Payne, Creek, Tulsa, Wagoner, Cherokee, Adair
Highway system
Oklahoma State Highway System Interstate US State Turnpikes
← SH-50 → SH-52

State Highway 51, abbreviated to SH-51 or OK-51, is a major state highway in Oklahoma, United States. It runs for 332.8 miles (535.6 km) east–west across the state, running from the Texas state line to Arkansas. It is the third-longest state highway in the system.