MMR may refer to:

Science and technology

  • MMR vaccine, for measles, mumps and rubella
  • DNA mismatch repair, a genetic repair pathway
  • Mass miniature radiography, a tuberculosis screening technique
  • Maternal mortality ratio
  • Maternal mortality rate
  • Mean-motion resonance, between two orbiting bodies
  • Mesozoic Marine Revolution, a burst of evolution
  • Micro modular reactor, a subcategory of Small Modular Reactors,  much smaller in scale than traditional nuclear reactors

Computing

  • Meet-me room, where telecoms companies can communicate
  • Modified Modified READ, Group 4 compression
  • Matchmaking rating, in video games

Places

  • Myanmar (ISO 3166-1 alpha-3 and UNDP country code)
  • Mumbai Metropolitan Region, India
  • Manmad Junction railway station (station code: MMR), Maharashtra, India

Other uses

  • Marine Mammal Regulations, of Canada
  • Master of Marketing Research, a business degree
  • Abbreviation formerly used for Melbourne Metro Rail, now known as the Metro Tunnel
  • Middle Gorge railway station, Melbourne