SMR may refer to:
Organisations
- Seattle Mountain Rescue, American non-profit
- Solomon Mahlangu Regiment of the South African Army
- Swedish Resistance Movement, a neo-Nazi political party
Places
- San Marino (by ISO 3166-1, IOC and FIFA country code)
- Rimba Secondary School (), Brunei
- Simón Bolívar International Airport (Colombia) (by IATA code)
- Tell Kazel (Ancient Egyptian: Smr), archaeological site in Syria
Railways
- Smethwick Rolfe Street railway station (station code: SMR), West Midlands, England
- Snowdon Mountain Railway, Gwynedd, Wales
- South Maitland Railway, NSW, Australia
- Stapleford Miniature Railway, Melton Mowbray, England
Biology and medicine
- Sensorimotor rhythm, a brain wave rhythm
- Standardized mortality ratio, in epidemiology
- Suppressed mite reproduction, a trait in honey bees, see varroa sensitive hygiene
Computing
- Shingled magnetic recording, a hard disk storage method
- State machine replication in distributed computing
- Symbolic Music Representation in MPEG-4 Part 3
Science and technology
- Small modular reactor, a type of nuclear reactor
- Specialized Mobile Radio
- Square matricial representation of polynomials
- Steam methane reforming, for producing hydrogen
- Surface movement radar, used by airports
- Slope mass rating, of rock mass
- Spherically Mounted Retroreflector, a laser tracker target
Other uses
- Shintō Musō-ryū, Japanese martial art
- Sites and monuments record, of archaeological sites in the UK
- Sprint medley relay, a track and field event