MFF may refer to:
- MAC-Forced Forwarding, (also known as MACFF) a networking technology designed to route all intrasubscriber traffic through the head end of an ISP's ethernet infrastructure.
- Malmö FF, a Swedish football club in Malmö
- Midwest FurFest, a furry fan convention hosted in Chicago, Illinois
- Military Freefall Parachutist Badge, a military badge of the U.S. Army awarded to soldiers qualified as a high altitude parachute specialist
- Molecular Frontiers Foundation, a non-profit science organization to promote interest in the science of chemistry
- Mozilla Firefox, a web browser
- Multiannual Financial Framework, a multiyear plan regulating the budget of the European Union
- Myanmar Football Federation, the governing body of football in Myanmar