Oklahoma State Highway 18

State Highway 18
State Highway 18
Route information
	Maintained by ODOT
Length	134.4 mi (216.3 km)
Existed	1924–present
Major junctions
South end	; US 177 / US 270 / US 270 Bus. / SH-3W in Shawnee;
	I-40 in Shawnee; US 62 in Meeker; I-44 / Turner Turnpike in Chandler; Future I-42 / US 412 / Cimarron Turnpike near Maramec; US 64 in Pawnee;
North end	K-15 at the Kansas state line
Location
Country	United States
State	Oklahoma
Highway system
	Oklahoma State Highway System; Interstate; US; State; Turnpikes;

State Highway 18, abbreviated as SH-18 or OK-18, is a highway maintained by the U.S. state of Oklahoma. It was once one of the longest state highways in the Oklahoma road system, but now has a total length of 134.4 mi (216.3 km).