INR or Inr may refer to:
- Indian rupee, ISO 4217 currency code: INR
Biology and medicine
- International normalized ratio of prothrombin time of blood coagulation
- Interventional neuroradiology, a minimally invasive medical speciality
- Initiator element, a core promoter in genetics
- Bureau of Intelligence and Research of the U.S. State Department
- Institute for Nuclear Research of the Russian Academy of Sciences
- Institute of National Remembrance, a Polish research institute
- Institut national belge de radiodiffusion, 1930–1960 name of the Belgian broadcaster RTBF
- McKinley National Park Airport, Alaska, USA, FAA identifier
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