Oklahoma State Highway 51

State Highway 51 marker
State Highway 51
Route information
Maintained by ODOT
Length332.8 mi (535.6 km)
ExistedJune 1, 1927–present
Major junctions
West end US 60 at Texas state line
Major intersections
East end AR 244 at the Arkansas state line
Location
CountryUnited States
StateOklahoma
CountiesEllis, Dewey, Blaine, Kingfisher, Logan, Payne, Creek, Tulsa, Wagoner, Cherokee, Adair
Highway system
  • Oklahoma State Highway System
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.