Many transit agencies serve Southern California. They range from large organizations serving thousands of people to one-route services provided by local cities. The majority of these agencies mainly serve localized areas of Los Angeles County. In many cases, some agencies bus routes overlap in the same area with other bus agencies.

Multi County Agencies

Amtrak Thruway/Amtrak California

Amtrak thruway, operating through the San Joaquins Joint Powers Authority, and LOSSAN Rail Corridor Agency, operate eight bus routes within Southern California. Popular routes do not require Amtrak tickets and are called city to city bus only thruway bus tickets. Transit hubs are Los Angeles Union Station and the Bakersfield station. LOSSAN Rail Corridor Agency has a Rail 2 Rail agreement that allows North County Transit District Coaster pass holders to ride Amtrak California at no additional cost.

List of Southern California transit agencies

Metrolink

The Metrolink rail service operates eight commuter rail routes throughout Southern California. Metrolink has an agreement with LOSSAN Rail Corridor Agency to allow Metrolink monthly pass holders to use Amtrak California trains via the Rail 2 Rail program at no cost within certain corridors

List of Southern California transit agencies

Imperial County Transit Agencies

Imperial Valley Transit

Imperial Valley Transit is the main transit operator in imperial county

Yuma County Area Transit

Yuma County Area Transit operates two routes within Imperial county. These routes are funded by Imperial County Transportation Commission

List of Southern California transit agencies

Kern County Transit Agencies

Arvin Transit

Arvin Transit is the local transit operator for the city of Arvin. offers service to Tejon Ranch and downtown Bakersfield

California City Transit

California City transit is a general purpose Dial-a-Ride operator within the city of California City

Golden Empire Transit

Golden Empire Transit is the main transit operator within the city of Bakersfield

Kern Transit

Kern Transit is the primary rural transit operator in Kern county. Coordinates with Eastern Sierra Transit in Lancaster and Inyokern.

Ridgecrest Transit

Ridgecrest Transit, also known as Ridgerunner, is the city of Ridgecrest's local transit system. Ridgecrest Transit operates five fixed routes, and one lifeline route to Randsburg and Johannesburg on Fridays. Ridgecrest Transit passengers are able to transfer to Eastern Sierra Transit in Inyokern and Kern Transit at city hall

Taft Area Transit

The city of Taft operates Taft Area Transit providing service to Maricopa

Los Angeles County Transit Agencies

All transit agencies in Los Angeles county are funded directly by LA metro local return program to be used by cities and the County of Los Angeles in developing or improving local public transit

Access Services

Access Services is the designated Consolidated Transportation Services Agency for Los Angeles County appointed by Los Angeles County Metropolitan Transportation Authority. Access Services provides paratransit transportation to disabled residents within Los Angeles County

Agoura Hills Transportation Services

The city of Agoura hills funds Agora Hills Transit as a general population dial-a-ride. The city also operates AH-Go in a city sponsored rideshare program.

Alhambra Community Transit

The city of Alhambra operates two transit routes with the ACT system. The Green Line runs as a city loop, with Valley Blvd and Main St as the key arteries of travel. This route runs six days per week in both a clockwise and counterclockwise direction. The Blue Line runs on weekdays from the Alhambra Civic Center to California State University, Los Angeles and its associated Metro Busway and Metrolink station.

Antelope Valley Transit Authority

Antelope Valley Transit Authority is the local transit agency serving the cities of Palmdale, Lancaster and Northern Los Angeles. It also provides commuter express service between the Antelope Valley and Downtown Los Angeles, the San Fernando Valley and the Century City/Westwood/UCLA area.

Arcadia Transit

The City of Arcadia operates fixed route and curb-to-curb service that is open to the general public and travels around the city limits. Connects with the Metro A line at the Arcadia Station and serves The Shops at Santa Anita and the LA County Arboretum.

Artesia Transit

The City of Artesia operates one free bus route that operates Thursday through Saturday within city limits