The following highways are numbered 667:
| Preceded by 666 | Lists of highways 667 | Succeeded by 668 |
State Route 667 is a state highway in the Reno-Sparks metropolitan area of Washoe County, Nevada. It follows a portion of Kietzke Lane, a major north–south arterial in the area.
State Route 648 runs from Kietzke Lane east along E. Second Street in Reno and Glendale Avenue in Sparks to S. McCarran Boulevard.
State Route 6 (SR 6) is a state highway that is unsigned. It travels through the central part of the U.S. state of Tennessee from Lawrence County to Sumner County. The highway is related to the following U.S. Highways:
