State Route 103 (SR-103) is a 0.225-mile-long (362 m) urban minor arterial state highway in the U.S. state of Utah. It branches off from SR-126 (Main Street) in downtown Clearfield and extends east to Interstate 15 (I-15), terminating at the entrance to the Falcon Hill National Aerospace Research Park, just outside of Hill Air Force Base. The entire route is located in Davis County and was formed in 1965 coinciding with the construction of I-15.