FMF may refer to:
- Flying Machine Factory superior power and performance motorcycle pipes
- Familial Mediterranean fever, a genetic inflammatory disorder
- Fantastic Mr. Fox, a book and film
- Feminist Majority Foundation, a feminist non-profit organization
- Fleet Marine Force, a combined command of the United States Navy and United States Marine Corps
- Football Association of Moldova, the governing body of football in Moldova
- Foxboro Midget Football, a football association in Foxboro and with Hockomock League
- Funkmaster Flex, a hiphop DJ in New York City
- Mexican Football Federation, the official governing body of the sport of football (soccer) in Mexico
- United States Foreign Military Financing, a program of the State Department and the Defense Department of the United States