State Route 151 (SR 151) is a state highway in the U.S. state of California. The route runs from Shasta Dam to Interstate 5 near Shasta Lake City, California. Its routing is in Shasta County, California.

This route is eligible for the State Scenic Highway System.

SR 151 begins at Shasta Dam, where the Sacramento river is dammed to form Shasta Lake. From Shasta Dam, the road heads south as Shasta Dam Boulevard, crossing through heavily vegetated area. The road then meets CR A18 within Shasta Lake (city). Heading eastward, the road enters the center of Shasta Lake before meeting its eastern terminus at Interstate 5.

Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, and do not necessarily reflect current mileage. The entire route is in Shasta County.