Thomas Cullen Davis (born September 22, 1933) is an American former oil tycoon who is best known for being acquitted of murder and attempted murder in two high-profile trials during the 1970s. At the time of his first trial, Davis was believed to be the wealthiest man to have stood trial for murder in the United States.

First he was accused of murdering his stepdaughter on August 2, 1976, during a contentious divorce from his second wife, Priscilla Davis. He was found not guilty. The second trial, two years later, involved allegations that Davis attempted to hire a hitman to kill both Priscilla and the judge overseeing his divorce from Priscilla. Again, Davis was acquitted.