Oklahoma State Highway 66

State Highway 66
State Highway 66
Route information
	Maintained by ODOT
Length	192.7 mi (310.1 km)
Existed	April 1, 1985–present
Major junctions
West end	I-40 BL / US 81 in El Reno
	I-344 / Kilpatrick Turnpike near Yukon; I-44 / SH-3 in Oklahoma City; I-235 / US 77 in Oklahoma City; I-35 from Oklahoma City to Edmond; Creek Turnpike in Sapulpa; I-244 in Sapulpa; US 75 in Tulsa; I-244 / US 412 in Tulsa; I-44 / US 412 in Catoosa;
East end	US 60 east of White Oak
Location
Country	United States
State	Oklahoma
Highway system
	Oklahoma State Highway System; Interstate; US; State; Turnpikes;

State Highway 66 (abbreviated SH-66) is a 192.7-mile (310.1 km) state highway in the U.S. state of Oklahoma, beginning at U.S. Highway 81 in El Reno and ending at U.S. Highway 60 near White Oak. The highway was designated in 1985 as a replacement for the decommissioned U.S. Highway 66. Although most of the highway follows Historic Route 66, the highway follows US 66's final alignment, joining Interstate 44 through Tulsa and Oklahoma City, while older versions of the route follow various city streets through both cities.

The highway has retained its importance for most of its length as it offers a non-tolled alternative to the Turner and Will Rogers Turnpikes which carry Interstate 44 between Oklahoma City and the Missouri state line.

SH-66 currently has one spur route, designated SH-66B, in Wellston.