California State Route 91

State Route 91
SR 91 highlighted in red, with relinquished portions in pink
Route information
Maintained by Caltrans
Length	59.047 mi[1] (95.027 km) Portions of SR 91 have been relinquished to or are otherwise maintained by local or other governments, and are not included in the length.
History	1930s as a highway; 1964 as number
Tourist routes	Riverside Freeway[2]
Major junctions
West end	Vermont Avenue in Gardena[3]
Major intersections	I-110 in Los Angeles I-710 in Long Beach SR 19 in Bellflower I-605 in Cerritos I-5 at the Buena Park–Fullerton border SR 57 in Anaheim SR 55 in Anaheim SR 241 Toll in Yorba Linda SR 71 in Corona I-15 in Corona
East end	I-215 / SR 60 in Riverside
Location
Country	United States
State	California
Counties	Los Angeles, Orange, Riverside
Highway system
State highways in California Interstate US State Scenic History Pre‑1964 Unconstructed Deleted Freeways
← SR 90 US 91, SR 91 → SR 92

State Route 91 (SR 91) is a major east–west state highway in the U.S. state of California that serves several regions of the Greater Los Angeles urban area. A freeway throughout its entire length, it officially runs from Vermont Avenue^[3] in Gardena, just west of the junction with the Harbor Freeway (Interstate 110, I-110), east to Riverside at the junction with the Pomona (SR 60 west of SR 91) and Moreno Valley (SR 60 and I-215 east of SR 91) freeways.

Though signs along the portion from Vermont Avenue west to Pacific Coast Highway (SR 1) in Hermosa Beach along Artesia Boulevard are still signed as SR 91, the California Department of Transportation (Caltrans) no longer controls this portion of the highway, as this segment was relinquished to local jurisdictions in 2003.^[3]

SR 91 inherited its route number from the mostly decommissioned U.S. Route 91 (US 91), which passed through the Inland Empire in a northeasterly direction on its way to Las Vegas, Salt Lake City, and points beyond. Those segments of US 91 are now parallel to, or have been replaced altogether by, I-15.