IDR may refer to:

• Indonesian rupiah, by ISO 4217 currency code
• Devi Ahilyabai Holkar International Airport, Indore, India, by IATA code
• Instantaneous Decoding Refresh in H.264/MPEG-4 AVC video, see Network Abstraction Layer
• Incentive Distribution Rights, see Master limited partnership
• Idiosyncratic drug reaction, a type of adverse drug reaction that is specific to an individual
• Independence Day: Resurgence, 2016 film
• Indian Depository Receipt, a financial instrument
• Inner Distribution Road, a ring road in Reading, Berkshire, UK
• International Depository Receipt, a negotiable security
• Iskandar Development Region, the southern development corridor in Johor, Malaysia
• Jane's International Defence Review, a monthly magazine reporting on military news and technology
• In Death Reborn, album by Army of the Pharaohs
• Volkswagen I.D. R