Diana could refer to:
- Starships
- Diana, a Federation transport
- SS Diana, a 22nd century luxury passenger liner
- USS Diana, a Hermes-class scout
- People
- Diana, Princess of Wales, the daughter-in-law of Queen Elizabeth II
- Diana Althouse, a counselor aboard the USS Robinson
- Diana Dyson, a neurologist aboard the USS Enterprise
- Diana Flores, a relief navigator aboard the USS Enterprise
- Diana Giddings, a junior engineer aboard the USS Enterprise-D
- Diana O'Day, a second lieutenant in the Starfleet Marines
- Diana Winters, a person whose birth record was the basis of a KGB agent's American alias
- Diana Wright, a medic aboard the USS Enterprise
- Locations
- Diana system, an Alpha or Beta Quadrant system
- Diana IV, fourth planet of the system
- Temple of Diana, an ancient Greek structure
- Diana system, an Alpha or Beta Quadrant system
- Other topics
- The Diana Lives! Foundation, a 22nd century initiative
- Real-world topics
- Diana G. Gallagher, a DS9 and VOY young adult novelist
- Diana Kornfeld, a Strange New Worlds contest winner
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