TPD
- Tallahassee Police Department
- Tampa Police Department
- Tamper proof device
- Temperature programmed desorption
- Temporary Protection Directive
- The Tortured Poets Department
- Therapeutic Products Directorate
- Time propagation delay
- Titusville Police Department
- Tobacco Products Directive
- Tokyo Performance Doll
- Ton
- Toronto Police Service
- Torrance Police Department
- Total permanent disability insurance
- Tucson Police Department
- Tulsa Police Department
- Victoria Transit Patrol