Gyr or gyr can mean:
- Phoenix Goodyear Airport (IATA code: GYR), an airport in Arizona, United States
- Gyrfalcon, a species of bird of prey
- Byr or Gyr, abbreviations for gigayear, i.e. a billion (109) years
- Gyr (cattle), an important Zebu breed of cattle
- See also
- GIR
- gyre
- gyro