It is California in 1852 that only recently being surrendered by Mexico to the United States and admitted into the union. Most of the land-owners of California were the descendants of the Dons who had colonized it a hundred years before and whose title deeds bore the signature and seal of a long-dead Spanish king. But, by a loop-hole in the law, the title-deeds of the Dons could not be recognized, and this opened the door of organized gangs of land-grabbers, such as the one led by Joe Kincaid, to operate with a prime excuse for legitimate plunder and robbery. In most cases the law was unable to cope with the situation. Then Rosita Castro, the daughter of Don Pasqual Castro, masked and disguised as a man, organized a band of vigilantes to fight against the tyranny of the outlaws, aided by an undercover federal agent, Jim Kearney.
Unfortunately the movie Rose of the Rancho is not yet available on HBO Max.
| Directing | Marion Gering | Director |
| Writing | Charles Brackett | Screenplay |
| Production | William LeBaron | Producer |
| Writing | Richard Walton Tully | Theatre Play |
| Art | Hans Dreier | Art Direction |
| Writing | David Belasco | Theatre Play |
| Writing | Nat Perrin | Screenplay |
| Sound | John Leipold | Original Music Composer |
| Editing | Hugh Bennett | Editor |
| Writing | Frank Partos | Screenplay |
| Sound | Heinz Roemheld | Original Music Composer |
| Camera | Leo Tover | Director of Photography |
| Sound | Friedrich Hollaender | Original Music Composer |
| Writing | Arthur Sheekman | Screenplay |
| Sound | Hugo Friedhofer | Original Music Composer |
| Art | Ernst Fegté | Art Direction |
| Costume & Make-Up | Travis Banton | Costume Design |
