Tristan Adams
- Full name: Tristan Adams
- Species: Human
- Gender: Male
- By mid-2240s: Psychologist (TOS Novel: The Captain's Oath; TOS: "Dagger of the Mind")
- Specializing in techniques of criminal rehabilitation (TOS: "Dagger of the Mind")
- By mid-2264: Director, Ixion II penal colony (TOS Novel: The Captain's Oath)
- By March 2266: Director, Tantalus V penal colony (TOS: "Dagger of the Mind")
- Death: March 3, 2266; Tantalus V penal colony (TOS: "Dagger of the Mind")
- Killed through over-exposure to neural neutralizer (TOS: "Dagger of the Mind")