MCR

MCR may refer to:

Music

 * Modena City Ramblers, an Italian folk rock band
 * My Chemical Romance, an American rock band
 * "MCR Calling," a track from the album Manchester Calling.

Organisations

 * Maryport and Carlisle Railway, M&CR, a pre-grouping British railway company
 * Midland Counties Railway, an early British railway company
 * Muslim Community Radio, a radio station based in London, UK
 * Middle common room, a postgraduate student organization
 * Marine Commando Regiment, Canada
 * Romandy Citizens' Movement (French: Mouvement Citoyens Romand), Swiss political party
 * MCR Property Group, a real estate group founded by Aneel Mussarat
 * MCR Hotels

Science

 * Methyl coenzyme M reductase, an enzyme that occurs in methanogenic archea
 * Micro Carbon Residue, a petroleum industry test
 * Mineralocorticoid receptor, a protein
 * Multi-component reaction, chemical reaction
 * Mutual Climatic Range, for determining past climate at an archaeological site

Technology

 * Move to Coprocessor from Register, an ARM architecture CPU instruction
 * Critical Mach number (Mcr), in aeronautics
 * Maximum continuous rating, of a generating station
 * Multi-component refrigerant
 * Monitor Console Routine, of RSX-11 operating system

Other

 * Medical care ratio, a healthcare metric
 * Master control room, a room for routing all incoming and outgoing signals
 * Master of Clinical Research, an academic degree
 * Marri Channa Reddy (1919–1996), Indian politician
 * MCR HRD Institute, a training institute named for Marri Channa Reddy