HRG may refer to:
- HRG Engineering Company Ltd, a British car manufacturer
- H. R. Giger, a Swiss painter
- Healthcare Resource Group, used within the English healthcare system. See also Diagnosis-related group (DRG).
- High-resistance grounding, an alternative to otherwise ungrounded electrical systems
- Histidine-rich glycoprotein, a human gene
- Hogg Robinson Group a corporate services company
- Home Retail Group, an English company
- Horn-rimmed glasses, a type of eyewear
- Hostage Response Group of New South Wales
- Hurghada International Airport, International Air Transport Association airport code
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