List of Interstate Highways in Oklahoma

Interstate Highways in Oklahoma form a network of freeways that cross the state. Several of them incorporated existing or already-planned turnpikes and continue to be maintained by the Oklahoma Turnpike Authority.^[2]

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
I-35	235.96	379.74	Texas state line south of Thackerville	Kansas state line north of Braman	01971-01-011971	current
I-40	331	533	Texas state line west of Erick	Arkansas state line west of Fort Smith, Arkansas	01959-01-011959	current
I-42	166	267	I-35 in Noble County, Oklahoma	Arkansas state line in Siloam Springs, Arkansas	proposed	—	Future Interstate
I-44	328.53	528.72	Texas state line north of Burkburnett, Tex.	Missouri state line west of Joplin, Mo.	01964-04-231964	current	Follows the route of the H. E. Bailey Turnpike, Turner Turnpike, and Will Rogers Turnpike
I-235	5.36	8.63	I-35/I-40/US-77/US-270 in Oklahoma City	I-44/US-77 in Oklahoma City	01976-07-131976[3]	current
I-240	26.22	42.20	I-344 (John Kilpatrick Turnpike) in Oklahoma City	I-40 in Oklahoma City	01965-01-011965	current	In 2024, I-240 was extended west following I-44 to SH-152 to I-344 adding 10 miles (16 km) to the route
I-244	15.75	25.35	I-44/SH-66 in Tulsa	I-44/US-412/SH-66 in Tulsa	01967-01-011967	current
I-335	19.6	31.5	I-40 near Oklahoma City	I-44 in Luther	02024-01-012024[4]	current	Redesignation of Kickapoo Turnpike; will be extended to I-35 in the future
I-344	31.0	49.9	I-240 in Oklahoma City	I-35/I-44 near Oklahoma City	02024-01-012024[4]	current	Redesignation of John Kilpatrick Turnpike
I-440	—	—	in Oklahoma City	I-35 in Oklahoma City	—	01965-01-01c. 1965	Became part of I-240, currently part of I-44
I-444	2.51	4.04	I-244/US-64/SH-51 in Tulsa	I-244/US-75 in Tulsa	—	—	Unsigned highway
Former       Proposed and unbuilt

Highway markers for Interstate 40, Interstate 240, and Interstate 40 Business
Interstate Highways highlighted in red
System information
Formed	August 14, 1957[1]
Highway names
Interstates	Interstate X (I-X)
Business Loops and Spurs:	Interstate X Business (I-X Bus.)
System links
Oklahoma State Highway System Interstate US State Turnpikes