Parr may refer to:
- Parr (surname), people with the surname Parr
- Parr, St Helens, a suburb of St Helens, England
- Parr, Indiana, a small town in the United States
- Parr (fish), a juvenile fish
- Parr (artist), an Inuit artist
- Carolinas-Virginia Tube Reactor, a demonstration heavy water nuclear reactor commonly called the Parr reactor after the plant's location of Parr, South Carolina