Campbell's Kingdom is a 1957 British adventure film directed by Ralph Thomas, based on the 1952 novel of the same name by Hammond Innes.

Recently diagnosed with a terminal disease, Bruce Campbell unexpectedly finds himself the owner of a small valley in the Canadian Rocky Mountains as the result of a bequest from his grandfather.

[1] After travelling from England, Bruce arrives at "Campbell's Kingdom" (as the locals disparagingly call it) to find its existence under threat from the construction of a new hydroelectricity dam.

Standing in his way is corrupt construction contractor Owen Morgan, who resorts to dirty tricks in order to prevent Campbell from succeeding in his quest.

However, Bruce is ably and enthusiastically assisted by love interest Jean Lucas, geologist Boy Bladen and drilling contractor James MacDonald.

Unfortunately for Campbell the residents of the nearby town of Come Lucky invested heavily in his grandfather's schemes, only to feel cheated when his projects came to nothing.

Film rights were purchased prior to the novel's publication by the producing-directing team of Betty Box and Ralph Thomas, who had just made The Venetian Bird (1952).

"He's a young Canadian whose friends help him strike oil on a piece of land willed by his grandfather to disprove the general belief that the old man was unhinged.

Other examples include Windom's Way (1957), Robbery Under Arms (1957), The Wind Cannot Read (1958), Nor the Moon by Night (1958) and Ferry to Hong Kong (1959).

Box wrote, "In those days dollars were very scarce, the Treasury didn't want to know and by shooting in Europe we would save a considerable amount of money that would have been spent in transporting people and equipment across the Atlantic and on to the foothills of the Rockies.

[1][16] Betty Box says three of the cast brought their wives on location to Italy – Michael Craig, Stanley Baker and Sid James – and all three were pregnant.

[20]BFI Screenonline said Campbell's Kingdom, along with later Bogarde-Box-Thomas adventure films such as The Wind Cannot Read and The High Bright Sun (1964) "could have benefited from a more conventionally rugged leading man" than Bogarde.