SHM may stand for:
- Nanki–Shirahama Airport (IATA: SHM), in Wakayama, Japan
- Sandringham railway station, Melbourne
- Prefix for several shared memory functions in Unix-like systems (shmat, shmctl, etc.)
- Shek Mun station, Hong Kong, MTR station code
- Simple harmonic motion, in physics
- Somatic hypermutation, allowing immune system adaptation
- Structural health monitoring of engineering structures
- Supporting Healthy Marriage, US study
- Swedish House Mafia, a house music supergroup from Stockholm