NRG may refer to:

• Several electronic music genres, including:
  • Hi-NRG, an early evolution of new-style disco
  • Hard NRG, a hard form of dance music
  • Euro-NRG, another name for Eurodance
• DJ NRG, an alias of Eurobeat artist Ken Laszlo (Gianni Coraini)
• NRG (South Korean band)
• "N-R-G", a 1990 song by Adamski

• Nieuw Republikeins Genootschap, a Dutch republican society
• NRG Energy, an energy company
  • NRG Park, Houston, Texas, US
  • NRG Stadium
  • NRG station, Philadelphia, Pennsylvania, US
• NRG Engineering, Singapore
• NRG360, previously nrg, a defunct Israeli news site
• NRG Networks, a UK-based business networking organisation
• NRG Recording Studios in North Hollywood, US
• Nuclear Research and Consultancy Group, Netherlands
• NRG Esports, an American esports organization
• Gestetner Group, later NRG Group
• NRG Realfagsgymnas [no], a Norwegian private school
• Northern Research Group, a group of MPs within the UK Conservative Party

• Neuregulins:
  • Neuregulin 1 or NRG1
  • Neuregulin 2 or NRG2
  • Neuregulin 3 or NRG3
  • Neuregulin 4 or NRG4
• Psychoactive compounds:
  • Naphyrone (NRG-1)
  • 4-MEC (NRG-2)
  • Pentylone (NRG-3)
  • RCS-4 (NRG-4)
  • 5-IAI (NRG-5)

• NRG (file format), used by the Nero Burning ROM utility
• Numerical renormalization group, a numerical technique to solve certain many-body problems where quantum impurity physics plays a key role
• New River Gorge National Park and Preserve

• Energy (disambiguation)
• NRJ (disambiguation)
• NAG (disambiguation)