King of the Texas Rangers

• 
  Sammy Baugh
  Ranger Tom King Jr.
• 
  Neil Hamilton
  John Barton / His Double (Ch. 12)
• 
  Pauline Moore
  Sally Crane
• 
  Duncan Renaldo
  Lieuenant Pedro Garcia
• 
  Charles Trowbridge
  Robert Crawford [Chs. 2-6,10,12]
• 
  Herbert Rawlinson
  Dr. Frohmann [Chs. 1, 4]
• 
  Frank Darien
  Pop Evans (Chs 1, 8)
• 
  Rudolph Anders
  His Excellency [Chs. 1,3,6,10-12]
• 
  Monte Blue
  Tom J. King Sr. [Ch. 1]
• 
  Stanley Blystone
  Judge
• 
  Kermit Maynard
  Rancher
• 
  Roy Barcroft
  Ross - Henchman [Chs. 1-7]
• 
  Kenne Duncan
  Nick - Henchman [Chs. 1-4,6-9]
• 
  Jack Ingram
  Shorty - Henchman [Chs. 2-4,6-8,10-11]
• 
  Robert Barron
  Blake - Henchman
• 
  Frank Bruno
  Cole (Ch 1)
• 
  Monte Montague
  Dade - Henchman
• 
  Joseph Forte
  Prof. Nelson [Chs. 3-5]
• 
  Lucien Prival
  Zeppelin Captain [Chs. 1,3,6,10,11,12]
• 
  George Allen
  Truck Thug (Ch. 7)
• 
  Hooper Atchley
  Druggist Porter (Ch. 4)
• 
  John Bagni
  Slater - Henchman (Ch. 10)
• 
  Bobby Barber
  Eduardo (Ch. 9)
• 
  George Barrows
  Dirigible Lieutenant
• 
  Earle D. Bunn
  Dirigible Heavy
• 
  Bob Burns
  Council Member
• 
  Forest Burns
  Gate Guard
• 
  Ed Cassidy
  Sedley (Ch. 6)
• 
  Jack Chapin
  Stub Latner
• 
  Tommy Coats
  Rancho Thug (Ch. 9)

• John English
• William Witney

• Ronald Davidson
  ...
  (original screenplay)
• Norman S. Hall
  ...
  (screenplay)
• William Lively
  ...
  (story and screenplay)
• Joseph O'Donnell
  ...
  (original screenplay)
• Joseph F. Poland
  ...
  (screenplay)

• Hiram S. Brown Jr.
  ...
  associate producer