Tri-state
- Illinois–Indiana–Kentucky tri-state area
- New York metropolitan area
- Tri-State (album)
- Tri-State (band)
- Tri-State (basketball)
- Tri-State Airport
- Tri-State Bird Rescue and Research
- Tri-State Christian Television
- Tri-State Conference (disambiguation)
- Tri-State League
- Tri-State Tollway
- Tri-State Tornado
- Tri-State district
- Tri-state area
- Tri-state check box
- Tri-state logic
- Trine University
- Tripoint (disambiguation)