State Route 147 (SR 147) is a state highway in the U.S. state of California. The route runs along the eastern side of Lake Almanor. It serves as a bypass to connect State Route 89 and State Route 36 on the eastern side of the lake, whereas the two highways already meet on the western side in Chester.

The route begins at State Route 89 in Canyondam. As it continues through Plumas County, it intersects County Route A13 before exiting the county. It then enters Lassen County where it intersects County Route A21 before meeting its north end at State Route 36.

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 numbers reset at county lines; the start and end postmiles in each county are given in the county column.