IRM
# IRM

IRM may refer to:

* IERS Reference Meridian
* Illinois Railway Museum
* Illinois Reserve Militia, state defense force active during World War II
* Bureau of Information Resource Management, responsible for information technology of the U.S. Department of State
* Information Rights Management
* L'Institut Royal Météorologique de Belgique
* Interference reflection microscopy, a microscopy method used to image adherent cells
* Internal Revenue Manual, an official compendium of internal guidelines for personnel of the United States Internal Revenue Service
* International Review of Mission, a quarterly academic journal
* International Roaming MIN assigned by IFAST
* IRM (album), by Charlotte Gainsbourg
* Iron Mountain Incorporated, a data storage company based in Boston, Massachusetts
* ICAO designator for Mahan Air, an Iranian airline
* Islamic Republic of Mauritania
