The Valt system was an inhabited planetary star system in the territory of the Klingon Empire, in the Beta Quadrant. The system consisted of the primary Valt and the inhabited planet Valt Minor. This was the homeworld of the Valtese. (TNG: "The Perfect Mate"; DIS: "Magic to Make the Sanest Man Go Mad")

Valt, the primary of the Valt system, was located in the Beta Quadrant on a star chart seen in the Star Trek: Discovery episode "Magic to Make the Sanest Man Go Mad".