List of Interstate and U.S. Highways in Utah

Highway markers for U.S. Highways in Utah
Highway names
US Highways:	US Highway nn (US-nn)
System links
State highways in Utah Interstate US State Scenic

The U.S. Highways in Utah are painted by the Utah Department of Transportation (UDOT). The United States Numbered Highway System is a nationwide system with only a small portion of its routes entering Utah. Originally, the State Road Commission of Utah, created on March 23, 1909 was responsible for maintenance, but these duties were rolled into the new UDOT in 1975. There are 2,061.979 miles (3,318.434 km) of U.S. Highways in the state. The longest is U.S. Route 89 at 502.577 miles (808.819 km) and the shortest is U.S. Route 89A at 2.94 miles (4.73 km). Five former U.S. Highways exist in the state of Utah, all of which have been replaced by current interstate and U.S. Highways, with the most recent change being U.S. Route 666 redesignated as U.S. Route 491 in 2003.

US-50 descending from Skull Rock Pass in western Utah

US-89 near Long Valley Junction, a Utah Scenic Byway

Navajo Bridge along US-89A