MFL
- Farmersburg, Iowa
- Luana, Iowa
- MFL League
- Macedonian Football League (disambiguation)
- Madras Fertilizers Limited
- Magnetic flux leakage
- Malaysian Football League
- Mallee Football League
- Manchester Football League
- Manitoba Federation of Labour
- Maritime Football League
- Market–Frankford Line
- Media Football League
- Message Format Language
- Midland Football League
- Midland Football League (1994)
- Midwest Football League (1935–1940)
- Midwest Football League (1962–1978)
- Modern foreign languages
- Montenegrin First League
- Montenegrin First League of Handball
- Montenegrin First League of Water Polo
- Montenegrin First League of Women's Handball
- Murray Football League