LFM may refer to:
- Liber feudorum maior, a medieval Catalonian cartulary
- Language Freedom Movement, an Irish political campaign of the 1960s
- L.F.M. Memorial Academy (Lawrence Franklin Mather), a private Christian academy located in Miramichi, New Brunswick
- Lycée Franco-Mexicain or the Liceo Franco Mexicano in Mexico City
- Lycée Français de Madrid or the Liceo Francés de Madrid in Madrid and Alcobendas, Spain
- Lycée Français de Medellin in Colombia
- Lycée Français Montaigne or the Lycée Montaigne de N'Djamena in N'Djamena, Chad
- Linear Feet per Minute, rate of air flowing over a surface
- LFM Software, a 3D laser scanning software.
- La Familia Michoacana, the powerful but now disbanded Mexican drug cartel.