HDR may refer to:

  • HDR, Inc., an American architectural and engineering firm
  • Hard disk recorder
  • Hevy Devy Records, a record label
  • High Dose Rate, a treatment technique in radiotherapy
  • High dynamic range imaging, digital imaging
  • High dynamic range rendering, 3D image rendering
  • Higher Degree by Research, a term for postgraduate education
  • Homology-directed repair, a DNA repair system in the cells of mammals
  • Hot Dry Rock, an experimental form of geothermal energy production
  • Human Development Report, an annual UN publication
  • Humanitarian daily ration, an air-dropped ration for disasters
  • Habilitation à Diriger des Recherches, higher doctorate in France
  • High Data Rate, the original name for the 1xEV-DO radio communications system