The three letter abbreviation PSR may refer to:
- Abruzzo International Airport (IATA airport code)
- Pacific School of Religion
- The Palestinian Center for Policy and Survey Research
- Panel Self-Refresh, a power-saving feature for display panels
- Permanent Speed Limit on British railways. In America Slow Zone
- Philmont Scout Ranch A working ranch in New Mexico, operated by the Boy Scouts of America
- Phrase structure rule
- Physicians for Social Responsibility
- Pines Springs Ranch A Seventh day-Adventist retreat and summer camp
- Police Service Representative, an LAPD dispatcher
- Portuguese Sign Language (ISO 639-3 language code)
- Posthumous sperm retrieval
- Potential support ratio
- Precision Sniper Rifle
- Predictive State Representation
- Price/sales ratio
- Project Status Report
- Primary surveillance radar
- Principle of sufficient reason
- Pseudorabies
- Pulsar, a kind of star
- Revolutionary Socialist Party (Portugal)
- Socialist Revolutionary Party
- Presentence report
- Pioneer Scout Reservation A boy Scout camp in northwest Ohio
- PHP Specification Request