# List of U.S. Routes in California

This is a list of U.S. Routes in the U.S. state of California. It includes routes defined by the California State Legislature but never built, as well as routes entirely relinquished to local governments. It also includes the routes that were decommissioned during the 1964 state highway renumbering.
Each U.S. Route in California is maintained by the California Department of Transportation (Caltrans) and is assigned a Route (officially State Highway Route) number in the Streets and Highways Code (Sections 300-635). Under the code, the state assigns a unique Route X to each highway and does not differentiate between state, US, or Interstate highways.
California still uses a version of the 1961 U.S. Route shield, featuring a simplified cutout shield containing only the outer border, "U S," and the route marker. All other U.S. states adopted the 1971 version of the marker, consisting of a white shield outline on a black square background.

## Mainline routes

* Lengths for each state route were initially measured as they were during the 1964 state highway renumbering (or during the year the route was established, if after 1964) based alignment that existed at the time, and do not necessarily reflect the current mileage. Portions of some routes have been relinquished to or are otherwise maintained by local or other governments, and may not be included in the length listed below. Several routes are broken into non-contiguous pieces, and their lengths may not reflect the overlaps that would be required to make them continuous. Some routes may also have a gap because it is either explicitly defined in the California Streets and Highways Code or due to an unconstructed portion, and the listed length may or may not reflect the gap.
* If a route was renumbered, the old or new number is given in the "notes" column.
* Concurrences are not explicitly codified in the Streets and Highways Code; such highway segments are listed on only one of the corresponding legislative route numbers. When a highway is broken into such segments, the total length recorded by Caltrans only reflects those non-contiguous segments, and does not include those overlaps that would be required to make the route continuous.
* Since the 1990s, a number of piecemeal relinquishments have been made. These are generally reflected in the length but not the termini.
* Former termini are not shown if they are along the current route, meaning that the route was simply extended.
* A U.S. Route may be partially signed as an Interstate Highway, while the remaining segment is signed as a U.S. Route.
| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
| US 6 | 40.505 | 65.186 | US 395 in Bishop | Nevada state line | 01937-01-011937 | current | Until 1964 western terminus was in Long Beach |
| US 40 | — | — | US 101 in San Francisco | Nevada state line | 01926-01-011926 | 01964-01-011964 | Replaced by I-80 |
| US 48 | 87.3 | 140.5 | First Street in San Jose | French Camp Road in French Camp | 01926-01-011926 | 01931-01-011931 | Renumbered as US 50 |
| US 50 | 108.624 | 174.813 | I-80 in West Sacramento | Nevada state line | 01926-01-011926 | current | Until 1964 western terminus was in San Francisco |
| US 60 | 255 | 410 | I-5 and former US 99 in Los Angeles | Arizona state line | 01926-01-011926 | 01972-01-011972 | Replaced by I-10; ran concurrently with US 70 |
| US 66 | 315 | 507 | SR 1 and former US 101 Alt. in Santa Monica | Arizona state line | 01926-01-011926 | 01969-01-011969 | Replaced by I-40 and other routes |
| US 70 | 255 | 410 | I-5 and former US 99 in Los Angeles | Arizona state line | 01926-01-011926 | 01964-01-011964 | Replaced by I-10; ran concurrently with US 60 |
| US 80 | 176.53 | 284.10 | I-5 and former US 101 in San Diego | Arizona state line | 01926-01-011926 | 01964-01-011964 | Replaced by I-8 |
| US 91 | — | — | SR 1 and former US 101 Alt. in Long Beach | Nevada state line | 01926-01-011926 | 01971-01-011971 | Replaced by I-15 and SR 91 |
| US 95 | 116.721 | 187.844 | Arizona state line | Nevada state line | 01930-01-011930 | current | |
| US 97 | 54.364 | 87.490 | I-5 in Weed | Oregon state line | 01935-01-011935 | current | |
| US 99 | 754 | 1,213 | Fed. 5 near Calexico | Oregon state line | 01926-01-011926 | 01964-01-011964 | Replaced by I-5; completely decommissioned in 1972 |
| US 99E | 141 | 227 | SR 99 and former US 99 in Wheeler Ridge | SR 99 and former US 99 in Sacramento | 01929-01-011929 | 01933-01-011933 | Most of former US 99E is now part of SR 99 |
| US 99W | — | — | SR 99 and former US 99 in Wheeler Ridge | SR 99 and former US 99 in Sacramento | 01929-01-011929 | 01964-01-011964 | Replaced by majority of I-5 |
| US 101 | 808.111 | 1,300.529 | I-5 / I-10 / SR 60 in Los Angeles | Oregon state line | 01926-01-011926 | current | Segment across the Golden Gate Bridge is not officially recognized as part of the state highway system; until 1964 southern terminus was in San Diego |
| US 101W | — | — | I-880 and US 101 | I-580 and US 101 | 01929-01-011929 | 01940-01-011940 | Reverted to US 101 after US 101E was decommissioned |
| US 101E | — | — | US 101 | US 101 | 01929-01-011929 | 01940-01-011940 | Renumbered into SR 17 |
| US 199 | 36.41 | 58.60 | US 101 near Crescent City | Oregon state line | 01926-01-011926 | current | |
| US 299 | 304 | 489 | US 101 in Arcata | US 395 in Alturas | 01934-01-011934 | 01964-01-011964 | Replaced by the majority of SR 299 |
| US 395 | 556.909 | 896.258 | I-15 near Hesperia | Oregon state line | 01979-01-011979 | current | Split into two segments, as the highway clips into Nevada to serve Carson City and Reno; until 1969 southern terminus was in San Diego |
| US 399 | 137 | 220 | US 101 in Ventura | SR 99 and former US 99 in Bakersfield | 01934-01-011934 | 01964-01-011964 | Replaced by SR 33 and SR 119 |
| US 466 | 526 | 847 | SR 1 in Morro Bay | Nevada state line | 01935-01-011935 | 01965-01-011965 | Replaced by SR 58 and I-15; ran concurrently with former US 91 |
| Former ||||||||
* Road sign on US 6 showing that it is 3205 miles to its eastern end in Provincetown, Massachusetts
* US 50 westbound as it winds down Echo Summit towards the west
* US 95 southbound at the California-Nevada state line
* US 97 sign on I-5 in the City of Weed
* US 101 northbound approaching Gaviota Tunnel through the Santa Ynez Mountains
* US 199 southbound at the California-Oregon state line
* US 395 southbound descending into Owens Valley from the Sierra Nevada, just north of Bishop

## Special routes

| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
| US 40 Bus. | — | — | Oakland | Berkeley | — | — | |
| US 40 Temp. | — | — | American Canyon | Cordelia | — | — | |
| US 40 Bus. | — | — | — | — | — | — | Served West Sacramento |
| US 40 Bus. | — | — | — | — | — | — | Served North Sacramento |
| US 40 Alt. | — | — | Davis, California | California-Nevada state line | — | — | |
| US 50 Bus. | — | — | — | — | — | — | Served Oakland |
| US 50 Bus. | — | — | — | — | — | — | Served Sacramento |
| US 50 Alt. | — | — | Pollock Pines | South Lake Tahoe, California | — | — | Unofficial signed route |
| US 60 Bus. | — | — | — | — | — | — | Served Riverside |
| US 60 Bus. | — | — | — | — | — | — | Served Banning |
| US 66 Alt. | — | — | Los Angeles | Pasadena | — | — | |
| US 66 Bus. | — | — | — | — | — | — | Served San Bernardino |
| City US 66 | — | — | — | — | — | — | Served San Bernardino |
| US 70 Bus. | — | — | — | — | — | — | Served Pomona |
| US 70 Bus. | — | — | — | — | — | — | Served Banning |
| US 80 Bus. | — | — | — | — | — | — | Served San Diego |
| US 80 Bus. | — | — | Winterhaven | Arizona-California state line | — | — | |
| US 91 Bus. | — | — | Corona | Riverside | — | — | |
| US 91 Bus. | — | — | Colton | San Bernardino | — | — | |
| US 91 Bus. | — | — | — | — | — | — | Served Victorville |
| US 99 Bus. | — | — | — | — | — | — | Served Banning |
| US 99 Bus. | — | — | — | — | — | — | Served Pomona |
| US 99 Bus. | — | — | Elysian Park | Sylmar | — | — | |
| US 99 Bus. | — | — | — | — | — | — | Served Fresno |
| US 99 Bus. | — | — | — | — | — | — | Served Merced |
| US 99 Bus. | — | — | — | — | — | — | Served Atwater |
| US 99 Alt. | — | — | Sacramento | Red Bluff | — | — | |
| US 99 Bus. | — | — | — | — | — | — | Served Sacramento |
| US 101 Bus. | — | — | Chula Vista | National City | — | — | |
| US 101 Bus. | — | — | — | — | — | — | Served San Diego |
| US 101 Alt. | — | — | Capistrano Beach | Oxnard | — | — | |
| US 101 Bus. | — | — | — | — | — | — | Served Buena Park |
| US 101 Bus. | — | — | — | — | — | — | Served Anaheim |
| US 101 Alt. | — | — | — | — | — | — | Served Long Beach |
| US 101 Bus. | — | — | — | — | — | — | Served Los Angeles |
| US 101 Byp. | — | — | Anaheim | Los Angeles | — | — | |
| US 101 Alt. | — | — | — | — | — | — | Served Santa Monica |
| US 101 Bus. | — | — | Universal City | Woodland Hills | — | — | |
| US 101 Bus. | — | — | — | — | — | — | Serves Ventura |
| US 101 Bus. | — | — | — | — | — | — | Serves Santa Maria |
| US 101 Bus. | — | — | — | — | — | — | Serves Arroyo Grande |
| US 101 Bus. | — | — | — | — | — | — | Serves Paso Robles |
| US 101 Bus. | — | — | — | — | — | — | Serves King City |
| US 101 Bus. | — | — | — | — | — | — | Serves Greenfield |
| US 101 Bus. | — | — | — | — | — | — | Serves Soledad |
| US 101 Bus. | — | — | — | — | — | — | Serves Gonzales |
| US 101 Bus. | — | — | — | — | — | — | Serves Salinas |
| US 101 Bus. | — | — | Gilroy | San Jose | — | — | |
| US 101 Byp. | — | — | San Jose | San Francisco | — | — | |
| US 101 Alt. | — | — | — | — | — | — | Served San Francisco |
| US 101 Bus. | — | — | — | — | — | — | Serves Novato |
| US 101 Bus. | — | — | — | — | — | — | Serves Petaluma |
| US 101 Bus. | — | — | — | — | — | — | Serves Santa Rosa |
| US 101 Bus. | — | — | — | — | — | — | Serves Cloverdale |
| US 101 Bus. | — | — | — | — | — | — | Serves Ukiah |
| US 101 Bus. | — | — | — | — | — | — | Serves Rio Dell |
| US 101 Bus. | — | — | — | — | — | — | Serves Fortuna |
| US 101 Bus. | — | — | — | — | — | — | Serves McKinleyville |
| US 395 Bus. | — | — | — | — | — | — | Served Riverside |
| US 395 Bus. | — | — | Colton | San Bernardino | — | — | |
| US 395 Bus. | — | — | — | — | — | — | Serves Ridgecrest |
| Former ||||||||