PBR may refer to:

Science and technology

• Passive bistatic radar
• Partition boot record
• Pebble bed reactor, a type of nuclear reactor
• Peripheral benzodiazepine receptor, another name for translocator protein
• Phosphorus bromide
• Photobioreactor
• Physically based rendering, a method used in computer graphics
• Policy-based routing
• Precariously balanced rock, another name for a balancing rock
• Pusey-Barrett-Rudolph theorem about the reality of quantum states

Commerce

• Petrobras, Brazilian oil company, NYSE code
• Payment by Results
• Pre-Budget Report, one of the two economic forecasts that HM Treasury is required to deliver to the UK Parliament each year

Military

• Patrol Boat, River, a US Navy designation
• Plastic baton round, a type of non-lethal projectile

Transport

• Potters Bar railway station, Hertfordshire, England, National Rail station code
• Puffing Billy Railway, tourist railway in Melbourne, Australia

Other

• Pabst Blue Ribbon, an American beer brand
• Parti Burkinabè pour la Refondation
• Pelita Bandung Raya, a football club based in Bandung, Indonesia
• Performance-based regulation of utilities
• Plant breeders' rights over new varieties
• Professional Bull Riders, an international professional bull riding organization