EFM may stand for:
- E FM, a radio channel in Sri Lanka
- EFM Academy, a study association in Maastricht, The Netherlands
- EFM32, 32-bit Energy Friendly Microcontrollers, from Energy Micro AS
- Education for Ministry, a theological training program of The Episcopal Church in the United States of America
- Eight-to-Fourteen Modulation, an encoding technique
- Electronic Fetal Monitoring, see Cardiotocograph, a measurement of the fetal heart rate
- Electrostatic Force Microscopy, a type of microscopy
- Enterprise Feedback Management, a term used in corporate surveys
- Ethernet in the First Mile, a networking technology