IDR can refer to:
- Indian Depository Receipt
- IDR, IATA code for Devi Ahilyabai Holkar International Airport, Indore, India
- IDR, ISO 4217 currency code of the Indonesian rupiah
- Infiltrate•Destroy•Rebuild, an album by CKY
- Inner Distribution Road, a ring road in Reading, Berkshire, UK
- Iskandar Development Region, the new main southern development corridor in Johor, Malaysia
- Instantaneous Decoding Refresh in H.264/MPEG-4 AVC video; see Network Abstraction Layer
- International Depository Receipt, a negotiable security; see cross listing