This is a list of state highways in the U.S. state of California that existed before the 1964 renumbering. It includes routes that were defined by the California State Legislature but never built, and is sorted by the unmarked legislative route number.^[3] For details on routes added before 1931, see history of California's state highway system#List of route numbers, 1917-1931; the dates given here are when the numbers were assigned (1916 for routes added in the first two bond issues, 1917 for routes added by the legislature before 1917).

Standard California state route shields, in the shape of a miner's spade to honor the California Gold Rush.[1][2]
Highway names
Interstates	Interstate XX (I-XX)
US Highways	U.S. Route XX (US XX)
State	State Route XX (SR XX)
System links
State highways in California Interstate US State Scenic History Pre‑1964 Unconstructed Deleted Freeways