TPD can refer to:
- Theory of Positive Disintegration
- Temperature programmed desorption
- Therapeutic Products Directorate
- Tamper Proof Device
- Time propagation delay
- Titusville Police Department, Florida, US
- Tallahassee Police Department, Florida, US
- Total permanent disability insurance
- Tokyo Performance Doll
- Tucson Police Department, Arizona, US
- Victoria Transit Patrol Department, Melbourne, Australia
- Tampa Police Department
- Telescopic pixel display
- Temporary Protection Directive in the European Union
- Tobacco Products Directive in the European Union
- Toronto Police Service in Canada
tpd can refer to:
- Ton per day, capacity specification for a pipeline