The term Tristar (meaning three star) may refer to:
- Tri-star (wheel arrangement)
- Lockheed L-1011 TriStar, a widebodied airliner
- Lockheed TriStar (RAF), L-1011-based tankers used by the Royal Air Force
- TriStar Pictures, a film production company
- Tristar 64, an add-on for the Nintendo 64 game console
- Tri-star, an add-on for the Super Nintendo game console, see Super 8 (video game accessory)
- Tristar-class cruiser from Robotech
- Tristar Productions
- TriStar Health System, the brand name for HCA Hospitals in Tennessee
- TriStar Music, a defunct record label distributed by Sony Music Entertainment
- "Tristar (film)", a 1996 Hong Kong movie directed by Tsui Hark
- Tristar (band) Popular Kazakh musical band