CMR can refer to:
- Civil-military relations
- Cathy McMorris Rodgers
- Comprehensive Microbial Resource
- Cross Movement Records, Christian Hip-hop record label
- CJSA-FM (CMR Diversity FM 101.3), a Toronto radio station
- Cameroon
- Carcinogenic, Mutagenic or toxic to Reproduction in the EU's Registration, Evaluation, Authorisation and Restriction of Chemicals law
- Cardiovascular magnetic resonance imaging
- Colossal magnetoresistance, an electrical phenomenon
- CMR convention, a UN convention on transport of goods by road
- Charles Marion Russell, artist
- Le Collège militaire royal de Saint-Jean, a Canadian military academy
- Code of Massachusetts Regulations
- Country Music Radio, a defunct European radio station
- Colin McRae Rally, a racing video game
- Colmar Airport, an airport
- Common-mode rejection ratio, a measure of the capability of an instrument to reject a signal that is common to both input leads
- Carbon-13 NMR, the application of NMR spectroscopy to carbon-13
- Cardiovascular Magnetic Resonance, the use of MRI for assessing the function and structure of the heart and cardiovascular system
- CMR (motorcycle company)
- Century Media Records, an independent rock record label
- Chemistry and Metallurgy Research Facility, a nuclear facility at Los Alamos National Laboratory
- Chennai Metro Rail
- Canadian Mounted Rifles, a designation of several cavalry and infantry units in the Boer War and the First World War
- Clear Motion Rate, a LCD screen technology used by Samsung for a better display of fast-moving images