NFA may refer to:
- N'fa, British-Australian hip hop musician best known for his work in 1200 Techniques
- Namibia Football Association
- National Farmers Association, the original name of the Irish Farmers Association
- National Fibromyalgia Association
- National Film Awards, awards presented by the Government of India to the best in Indian cinema
- National Fire Academy, federal fire training institution in Emmitsburg, Maryland
- National Fire Agency, the national emergency services authority in Taiwan
- National Fire Adjustment Co., Inc, A public adjuster firm based in Buffalo, NY.
- National Firearms Act
- National Firearms Association
- National Flute Association
- National Food Authority (Philippines)
- National Football Academy, Lithuania
- National Forensics Association
- National Futures Association
- Native Forest Action, an environmental organisation in New Zealand
- New Farmers of America
- New Fighter Aircraft Project
- Newburgh Free Academy
- Nigeria Football Association
- No fixed abode
- Nondeterministic finite automaton (also abbreviated as NDFA)
- Northeastern Football Alliance
- Norwich Free Academy
- Nykøbing Falster Alliancen, now Lolland-Falster Alliancen