Listed in later reports of the California Railroad Commission. Most company names were the routes operated, for other companies the headquarters are identified.
Aetna & Pope Stage (St. Helena)
Allen & Reese Stages (Sanger)
Alpaugh-Earlimart Auto Line
Alturas-Bieber Stage Line
Alturas-Surprise Valley Stage Line
Amador Stage Lines (Sacramento)
American Stage Co. (Ferndale)
Annapolis & Stewart's Point Auto Line
Frank Atkinson (Los Angeles)
Atlas Mail & Stage Line (Napa)
Auburn & Forest Hill Stage Line
Auburn-Georgetown Stage
Bakersfield-Wasco Stage Line
Bay Cities Transit Co. (Santa Monica)
Bay Rapid Transit Co. (Monterey)
Belden-Chester Stage Line
Belvedere Bus (Belvedere)
Belvedere Gardens Bus Line (Los Angeles)
Benicia-Vallejo Stage Line
Blairsden-Johnsville Stage Line
Blairsden-Lakes Center Stage
Narciso Boronda Mail Stage (Monterey)
Boyd Stage Co. (Bakersfield) (to Pacific Greyhound Lines)
Bridgeville-Ruth Auto Stage Line
Buffo & Coniglio Auto Stage (Pittsburg)
California Hot Springs Stages
California-Nevada Stages (Sacramento)
California Transit Co. (to Pacific Greyhound Lines)
Calistoga & Clear Lake Stage Co. (to Pacific Greyhound Lines)
Cambria Stage Line (San Luis Obispo)
Camp Elwell Stage (Blairsden)
Camp Nelson Auto Stage Line
Camp Seco-Valley Springs Stage Line
R. S. Cassady Auto Line (Blairsden)
Central Transit Co. (Stockton)
Chico-De Sabla Stage
Chico-Paradise-Stirling City Stage Line
Chico-Willows Stage
Chilcoot-Downievlle Stage Line
Chinese-Groveland Stage Line (Big Oak Flat)
Citizens Auto Stage Co. (Nevada City)
City Transit Co. (Modesto)
Cloverdale-Elk-Navarro Stage
Cloverdale-Geyser Stage Line
Coast Line Stages (Fort Bragg)
Coastside Transportation Co. (San Francisco)
Colfax-Forest Hill Stage Line
Columbia Stage Line
Concord Transit Co.
Copperopolis & Milton Auto Stage
Corning-Paskenta Auto Service
Cottonwood & Shingleton Stage Co.
Covelo Stage Line
Crescent Mills-Seneca Stage Line
Dardanelle Stage Line (Sonora)
Derkum Stage Lines (Bakersfield)
Descanso & Alpine Stage Line
Dorris Stage & Freight Line (Forest)
Downieville Stage Co.
Elk Creek-Alder Springs Auto Line
El Segundo Transit Co.
Etna-Fort Jones-Yreka Stage Line
Eureka-Bridgeville Auto Stage Line
Fortuna-Bridgeville Stage Line
French Gulch-Carrville Auto Line
Fresno-Riverdale Stage Co.
Garden Highway Transit Co. (Sacramento)
Georgetown-Placerville Stage
Gilroy-Hot Springs Stage
Glenn Ranch Stage Line
Golden Gate Stages (Santa Rosa) (to Pacific Greyhound Lines)
Goleta Bus & Messenger Service (Santa Barbara)
Richard Gribble (Junction City)
Gridley Auto Bus Co.
J. B. Grissel & Co. (Nevada City)
H&A Auto Line (Los Angeles)
Half Moon Bay Stage Line
Hammond-Three Rivers Auto Line
Harwood Stage Line (Laytonville)
Hicks & Rogers Transit Co. (Stockton)
Highland Transportation Co. (San Pedro)
High Sierra Transport Co. (Bishop)
Holbrook & Shuler Transportation Co. (Bell)
Home Stage Line (Taft)
Hornbrook-Happy Camp Stage Line
Hornitos-Merced Falls Auto Line
Imperial Beach Stage & Express Line
Inglewood Transit Lines
Inverness Auto Stage & Garage Co.
Jackson-Ranger Station Auto Line
Jackson-Volcano Auto Line
Kern County Transportation Corp. (to Pacific Greyhound Lines)
Kernville Stage Co.
Klamath Auto Stage Line (Yreka)
Klamath-Weed Stage Line (Klamath Falls)
L&L Transportation Co. (San Pedro)
Lake County Transportation Co. (Lakeport)
Lampson Stage Line (Geyserville)
Laurel Canyon Stage (Hollywood)
Lee's Auto Stage Line (San Bernardino)
Lewiston-Minersville Auto Line
Livermore Valley Stages
Lone Pine & Keeler Auto Stage Line
Los Angeles & Trona Stages
Machomich Stage (Blairsden)
Madera-Sugar Pine Stage Co.
Madera-Wawona Stage Line
Markleeville-Fredericksburg Stage Line
Martinez-Bay Point Stage Co.
Martinez-Concord Automobile Stage
Marysville & Camptonville Stage Line
Marysville-LaPorte Stage Co.
Marysville-Nevada City Auto Stage
McCaughey Bros. (San Francisco)
Mendocino Coast Transit Co. (Fort Bragg)
W. R. Miles Stage Lines (Fresno)
Modesto-La Grange Stage
Mokelumne Hill Auto Stage Co.
Monterey-Big Sur Auto Line
Monticello Utility Corp.
Motor Coach Co. (Long Beach)
Motor Transit Co. (to Pacific Electric Railway)
Mt. Hamilton Stage Line
Mt. Lassen Transit Co. (Westwood)
John P. Muscardini (Nevada City)
Henry S. Musgrave (Walker)
Napa Valley Bus Co.
Nelson Auto Service (Palo Alto)
Nipton-Searchlight Auto Passenger & Freight Service
North Fork Stage Co. (Fresno)
North Sacramento Stage Line
Ojai-Ventura Stage
Original Stage Line (San Fernando)
Orland-Elk Creek Auto Line
Oroville-Lumpkin Stage Line
Oroville-Woodleaf Auto Service
Pacific Auto Stages (to Pacific Greyhound Lines)
Pacific Coast Motor Coach Co. (Los Angeles) (to Pacific Greyhound Lines)
Pacific Palisades Bus Line
Pacific Southwestern Transportation Co. (Lompoc)
Pacific Union College Association (Angwin)
Pajaro Valley Consolidated Railroad Co. (San Francisco)
Palm Springs Stage & Express Co.
Palomar Mt. Stage & Truck Line (San Diego)
Palos Verdes Transportation Co. (Los Angeles)
Pasadena-Ocean Park Stage Line
Peerless Stages
Peninsula Rapid Transit Co. (to Pacific Greyhound Lines)
Petrolia Stage Co.
Dennis Pettas Auto Stage (Pittsburg)
Pickwick Corp. (to Pacific Greyhound Lines)
Pierce Arrow Stage Line (to Pacific Greyhound Lines)
Pino Grande Stage Line (Placerville)
Pioneer Auto Stage Lines (Colusa)
Placerville-Cool Auto Line
Placerville-Grizzly Flats Stage
Potter Valley-Ukiah Auto Stage
Prairie Avenue Transit Line (Inglewood)
Quincy-LaPorte Stage Line
Red Bluff-Gerber Stage
Red Bluff-Jelly Auto Line
Red Bluff-Manton Stage
Redding-Bieber Stage Line
Redding-Harrison Gulch Auto Service
Redding-Weaverville Stage Co.
Redwood Park Auto Line
Redwood-Woodside Stage Line
Reno-Calpine-Loyalton Stage Line
Richardson Springs Stage
Rio Vista Transit Co.
River Auto Stages (Sacramento)
Riverside Rapid Transit Co.
Harvey Rose Automobile Stage Service (Martinez)
Rubicon Springs Stage
Sacramento-Broderick-Westgate Stage
Sacramento-Fair Oaks Stage Line
San Antonio Transfer Co. (Camp Baldy)
San Benito-Tres Pino Stage Line
San Diego-Tecate Auto Service
San Gabriel Canyon Stage Line (Azuza)
San Luis-Pismo-Avila Pioneer Stages
San Luis Obispo-Simmler Stage Line
San Quentin Stage Co. (Santa Rosa)
San Rafael Bus Service
San Rafael & Sonoma Valley Auto Stage Line
Santa Maria-Guadalupe Stage Line
Santa Monica Mountain Coach Lines
Sausalito-Stinson Beach-Bolinas Auto Line
Scenic Auto Stage Line (La Honda)
Scott Bar-Fort Jones-Yreka Auto Stage Line
Sequoia & General Grant National Parks Co.
Sequoia National Park Stage Co.
Smith Automobile Co. (Bishop)
Smith Auto & Stage Lines (Etna)
South Fork-Petrolia Stage Line
Southern Pacific Motor Transport Co. (to Pacific Greyhound Lines)
Spreitz Transportation (Santa Barbara)
Stimson Transit Co. (Maywood)
Stockton-Angels Camp Stage Line
Stockton-Jackson Stage Line
Sullivan's Auto Stage Line (Willows)
Sunset Motor Coach Co.
Susanville-Doyle Line
Susanville-Klamath Falls Stage Line
Swartout Valley Transfer (San Bernardino)
Tahoe Transportation Co.
Tassajara Hot Springs Co.
Terminal Island Transit Co.
Tijuana Stages
Tres Pinos-New Idria Stage Line
Truckee-Sierraville Auto Line
Tucker Bros. Auto Truck Line (Etna)
Tustin-Santa Ana Stage Line
Union Pacific Stage Co. (to Overland Greyhound Lines)
Vallejo Bus Co.
Valley & Coast Transit Co. (San Luis Obispo)
Valley Springs-Sheep Ranch-San Andreas Stage
Ward's Auto Stage (Pittsburg)
Washington Stage & Express Co. (Nevada City)
Weaverville-Peanut Stage Line
Weed-Mt. Shasta-Dunsmuir Stage Line
West Coast Rapid Transit Co. (Hermosa Beach)
Westside Transit (Modesto)
Westside Transit Co. (Long Beach)
Weston & Curson Stage Line (Woodland)
Whitcomb Stages (Los Angeles)
White Point Bus Line (San Pedro)
Wilbur Springs Stage Co.
Williams-Bartlett Springs Stage Line
Willits-Hearst Stage Line
Wilmington Bus Co.
Winegar Freight & Passenger Service (Palo Cedro)
Woolett Stages (San Diego)
Yosemite Park & Curry Co.