Ird may refer to the following:
- Ird (Bedouin), a Bedouin honor code for women
- Ird (noun): Someone who lives in a state of total delusion. Closely related to narcissistic personalities.
- Ird, alternate name of Arad, Iran, a city in Fars Province
As an initialism, IRD may refer to:
- Influenza Research Database, a publicly-available database and analysis resource for influenza virus research
- Inland Revenue Department, in some countries
- Integrated receiver/decoder
- Institut de recherche pour le développement ("Institute of research for development"), a French scientific institution dedicated to the development of tropical countries
- Intelligent Resource Director, on IBM mainframes
- International Relief and Development Inc., a USAID grantee
- Internet radio device
- Institute on Religion and Democracy, a conservative Christian organization
- Information Research Department, a former department of the British Foreign Office
- "Image Replacement Document", another name for Substitute check as defined in the Check Clearing for the 21st Century Act (Check 21)
- Interest rate derivative, a financial instrument
- Ice rafted debris
- Income in respect of a decedent for U.S. income taxes
- International Road Dynamics Inc.