Interstate 40 in Oklahoma

Interstate 40
I-40 highlighted in red
Route information
Maintained by ODOT
Length	331 mi (533 km)
Existed	1957[1]–present
NHS	Entire route
Major junctions
West end	I-40 at the Texas state line
Major intersections	US 283 in Sayre US 81 in El Reno I-344 / Kilpatrick Turnpike in Oklahoma City I-44 in Oklahoma City I-235 / I-35 / US 77 in Oklahoma City I-240 in Oklahoma City I-335 / Kickapoo Turnpike in Oklahoma City Indian Nation Turnpike in Henryetta US 69 in Checotah Muskogee Turnpike near Webbers Falls
East end	I-40 at the Arkansas state line
Location
Country	United States
State	Oklahoma
Counties	Beckham, Washita, Custer, Caddo, Canadian, Oklahoma, Pottawatomie, Seminole, Okfuskee, Okmulgee, McIntosh, Muskogee, Sequoyah
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Oklahoma State Highway System Interstate US State Turnpikes
← SH-39 → SH-42

Interstate 40 (I-40) is an Interstate Highway in Oklahoma that runs 331 miles (533 km) across the state from Texas to Arkansas. West of Oklahoma City, it parallels and replaces old U.S. Highway 66 (US-66), and, east of Oklahoma City, it parallels US-62, US-266, and US-64. I-40 is the longest Interstate highway in Oklahoma.

Cities along the route include Erick, Sayre, Elk City, Clinton, Weatherford, Oklahoma City and its suburbs (El Reno, Yukon, Del City, and Midwest City), Shawnee, Okemah, Henryetta, Checotah, and Sallisaw.