| National Aerial Firefighting Academy | Academic & Science |
| National Academy of Fine Arts | Academic & Science |
| National Association of Fleet Administrators, Inc. | Business |
| National Alfalfa and Forage Alliance | Business |
| National Academy of Financial Accountants | Business |
| Native American Fund Advisors | Business |
| National Air Filtration Association | Business |
| National Association of Forensic Accountants | Business |
| North American Fur Auctions | Business |
| National Agency of Fisheries and Aquaculture | Business |
| Net Acquisition Of Financial Assets | Business |
| Nurse Anesthesiology Faculty Association | Community |
| Nepal Adoptive Families Association | Community |
| Nanyang Academy of Fine Arts | Community |
| National Association of Fellowship Advisors | Community |
| National Association of Fellowships Advisors | Community |
| North American Falconers Association | Community |
| Northwest Adoptive Families Association | Community |
| North American Fastpitch Association | Community |
| National Association for Fixed Annuities | Community |
| National Association of Fat Asses | Community |
| National Association of Fleet Administrators | Community |
| Networking Action for Filmmakers & Actors | Community |
| Nuevo Acceso Ferroviario a Andalucía | General |
| Nahverkehrsfahrzeug | General |
| National Automotive Finance Association | General |
| National Automotive Finance Annual | General |
| Norddeutsche Automobilfabrik Ag | General |
| Nuevo Acceso Ferroviario a Andaluc? | General |
| National Aircraft Finance Association | General |
| Northeast Arkansans for Animals | General |
| North American Fur Auction | International |
| Nurse Anesthesiology Faculty Associates | Medical |
| Nurse Anesthesia Faculty Associates | Medical |
| Nauru Australian Football Association | Regional |
| North American Flyball Association | Sports |
| National Amateur Football Association | Sports |
| North Atlantic Football Agency | Sports |
