These bus companies were listed in the 1924 Annual Report of the Arizona Corporation Commission, as in existence. Many companies were often resold, some companies are listed using earlier more meaningful names.
Anderson & Barton (original route: Payson-Camp Verde)
Apache Powder Co. (original route: Benson-Curtiss)
Arizona Bus Co. (original route: Prescott-Jerome)
1917-1920 was Jordon Stage Line
W. C. Babcock (original route: Kingman-Signal)
Borderland Stage Co. (original route: Yuma-Rodeo NM)
Borderland Transit Co. (original route: Phoenix-Ehrenberg)
Previously operated by Arizona Pacific Transit Co.
G. W. Boston (original route: Phoenix-Marinette)
W. T. Branaman (original route: Florence-Florence Depot)
Arthur Branham (original route: Douglas-Courtland)
W. G. Brundage (original route: Mesa-Gilbert)
Cactus Stage Line (original route: Cactus-Phoenix)
Later operated by W. C. Hyatt
Cansler & Webster (original route: Morenci-Safford)
Chrysotile Stage Line (original route: Globe-Chrysotile)
After 1921 operated by J. A. Pinyan
Citizens Auto Stage Co. (original route: Tucson-Nogales)
Operated 1916-1998/1921 absorbed competing Marmon Short Line
Consolidated Stage Co. (original route: Globe-Miami-Copper Hill)
District Auto Service (original route: Yuma-Somerton-Gadsden)
Charles Fowler (original route: Nogales-Camp Stephen Little)
Globe-Payson Stage Co. (original route: Globe-Payson)
Globe-Pleasant Valley Auto Stage Co. (original route: Globe-Pleasant Valley)
Later operated by John Penn
Roy Hahenkratt (original route: Phoenix-Mayer)
F. C. Harris (original route: Phoenix-Ft. McDowell/Springers Ranch/Laveen)
Higgins Stage Line (original route: Mayer-Canon)
Lower Miami Stage (original route: Miami-Claypool)
Miami-Inspiration Stage (original route: Miami-Inspiration)
Montezuma Stage Line (original route: Camp Verde-Cottonwood)
Incorporated 1923/previously operated by Verde Valley Stage Co.
Motor Transit Co. (original route: Douglas-Bisbee)
Incorporated 1916
Mountain Auto Co. (original route: Clifton-Morenci)
Incorporated 1914
C. D. Neil (original route: Chandler-West Chandler)
Newton's Auto Stage (original route: Naco-Bisbee)
Nogales-Patagonia Stage Line (original route: Nogales-Patagonia)
Phoenix-Casa Grande Stage (original route: Phoenix-Casa Grande)
Later operated by Cactus Garage, C. D. Bradman, Harold Earley
Phoenix-Glendale Stage (original route: Phoenix-Glendale)
Later operated by C. O. Bainbridge
Phoenix-Scottsdale Stage (original route: Phoenix-Scottsdale)
Later operated by C. O. Bainbridge
Rockhill Stage Line (original route: Bisbee-Tombstone)
Sacaton Stage (original route: Casa Grande-Sacaton)
Later operated by A. T. Kilcrease
W. E. Scarlett (original route: Phoenix-Chandler)
A. B. Scheppke (original route: Tucson-Pastime Park)
W. W. Sherwood (original route: Holbrook-Keems Canon)
Previously operated by L. S. Howard
Short Line Stage Co. (original route: Miami-Hayden-Winkelman)
Incorporated 1919
Sills Stage Line (original route: Prescott-Fort Whipple)
E. A. Staggs (original route: Tucson-Summerhaven)
Star Auto Stage (original route: Tucson-Hayden)
Tombstone-Nogales Stage (original route: Tombstone-Nogales)
After 1923 operated by R. C. Laney
Udall Transportation Co. (original route: Holbrook-Keems Canyon/Fort Apache)
Union Auto Transportation Co. (original route: Phoenix-Globe)
Incorporated 1917
United Stages (original route: Kingman-Oatman)
Previously operated by Kingman-Oatman Auto Stage
Verde Valley Stage Co. (original route: Clemenceau-Jerome)
Warren-Lowell Stage Co. (original route: Lowell-Warren)
J. W. Weber (original route: Prescott-Construction Camps)
Wickenburg Transfer Co. (original route: Wickenburg-Constellation)
Previously operated by C. M. Shannon, later operated by Eugene Upton
Ralph Wood (original route: Kingman-Chloride)