Cowboy Bob may refer to:

  • Bob Bradley (wrestler) (also "Cowboy" Bob Bradley), retired American professional wrestler
  • Bob Kelly (wrestler) (also "Cowboy" Bob Kelly; 1936–2014), American professional wrestler and booker
  • Robert H. Macy (also "Cowboy Bob"; 1930–2011), Democratic District Attorney
  • Bob Orton Jr. (also "Cowboy" Bob Orton; born 1950), American retired professional wrestler
  • Cowboy Bob, a fictional character from the daily syndicated newspaper comic strip Dennis the Menace
  • Peggy Jo Tallas, who was wanted by the FBI under this name when she robbed banks in disguise