Tri
- 3
- AC Tripoli
- El Tri (band)
- Mexico national football team
- Taipei Ricci Institute
- Tamalpais Research Institute
- Total return index
- Toxics Release Inventory
- Translational Research Institute (Australia)
- Tri (album)
- Tri (film)
- Tri (novel)
- Tri Hartanto
- Tri Rismaharini
- Tri-Cities Regional Airport
- Triangular function
- Triangulum
- Trichloroethylene
- Trinidad and Tobago
- Triple H
- Triple reuptake inhibitors
- Trisakti University
- Try Sutrisno