| Naropa University | private not-for-profit educational institution, university | — | 1974 |
| Narus | business, software | Sunnyvale | 1997 |
| National Academy of Engineering | academy of sciences | Washington, D.C. | 1964 |
| National Airlines | airline | Orlando | 1985 |
| National Airlines | airline | Miami-Dade County | 1934 |
| National Association of Underwater Instructors | business | Florida | 1959 |
| National Basketball Association | basketball association, professional sports league, basketball league, online database | — | August 3, 1949 |
| National Center for Biotechnology Information | research institute, data library | Bethesda | November 4, 1988 |
| National Defense University | national defense university, staff college | — | 1976 |
| National Oilwell Varco | business, enterprise, public company, oilfield service company | Houston | 1862 |
| National Wrestling Alliance | business, enterprise, professional wrestling promotion | Houston | 1948 |
| Nature Portfolio | publishing house, open-access publisher, academic publisher | London | 1999 |
| Naughty Dog | video game developer | Santa Monica | 1984 |
| NBCUniversal | subsidiary company, enterprise | 30 Rockefeller Plaza | 1926 |
| NCR Corporation | business, enterprise, public company | Atlanta, Augsburg | 1884 |
| Neiman Marcus | business | Dallas | 1907 |
| Netflix, Inc. | television production company, film distributor, business, enterprise, public company | Los Gatos | August 29, 1997 |
| NetJets | airline, business | Columbus | 1964 |
| Netlify | business | San Francisco | January 27, 2014 |
| NetSuite | business, enterprise, public company | Austin | 1998 |
| Network Solutions | dot-com company, certificate authority, enterprise | Herndon | 1979 |
| Neutral Buoyancy Laboratory | neutral buoyancy pool, laboratory | Houston | 1995 |
| New Balance | business, subsidiary company | Boston | 1906 |
| New England Conservatory | conservatory, university building, private not-for-profit educational institution, college of music | — | 1867 |
| New Jersey Transit | transport company | New Jersey, New York City | 1979 |
| New Mexico Institute of Mining and Technology | public educational institution of the United States, higher education institution, university, school of mines | Socorro | 1889 |
| New Mexico State University | public educational institution of the United States, open-access publisher, land-grant university, public university | University Park | 1888 |
| New York Botanical Garden | nonprofit organization, botanical garden, educational institution | The Bronx, New York City | 1891 |
| New York City Opera | opera company | — | 1943 |
| New York City Public Schools | municipal authority, school district in the United States, ministry of education | Tweed Courthouse | 2002 |
| New York Film Academy | drama school, film school | New York City | 1992 |
| New York Institute of Technology | private not-for-profit educational institution, university | — | 1955 |
| New York Marriott Marquis | skyscraper, hotel | — | 1985 |
| New York Mercantile Exchange | stock exchange, business | New York City | 1872 |
| New York Public Library | nonprofit organization, library network, public library | New York City | May 23, 1895 |
| New York University Press | website, university press | New York City | 1916 |
| New York University School of Law | law school, faculty, organization | — | June 2, 1835 |
| New York University Tisch School of the Arts | film school, performing arts school | — | 1965 |
| Newberry Library | research library, nonprofit organization, rare book library | Chicago | July 1, 1887 |
| Newegg | website, business | City of Industry | 2001 |
| Newmont Mining Corporation | business, company, public company | Denver | 1916 |
| News Corp | business, enterprise, public company | New York City | June 28, 2013 |
| NexGen | business, enterprise | Milpitas | 1986 |
| NeXT | business, enterprise | Palo Alto, Redwood City | June 20, 1985 |
| NextEra Energy | holding company, business | Juno Beach | 1925 |
| Niagara University | private not-for-profit educational institution, university | — | 1856 |
| Nickel City Opera | opera company | Buffalo | 2004 |
| Nickelodeon Animation Studio | animation studio | Studio City, Burbank, New York City | March 4, 1998 |
| Nickelodeon Movies | film production company | Los Angeles | 1995 |
| Nike | business, enterprise, public company | Beaverton | January 25, 1964 |
| Nintendo Software Technology | video game developer | Redmond | 1998 |
| Noble Energy | business, enterprise, public company | Houston | 1932 |
| North American Airlines | airline | Peachtree City | 1989 |
| North American Arms | business | Provo | 1972 |
| North American Aviation | former entity, aerospace manufacturer | Los Angeles | December 6, 1928 |
| North Carolina Agricultural and Technical State University | historically black college or university, public educational institution of the United States, land-grant university, public university | Greensboro | 1891 |
| North Carolina Central University | historically black college or university, public educational institution of the United States, university | Durham | 1909 |
| North Carolina State University | public educational institution of the United States, open-access publisher, land-grant university, public research university | Raleigh | 1887 |
| Northeast Airlines | airline | Boston | 1931 |
| Northeastern Illinois University | public educational institution of the United States, university | — | 1867 |
| Northeastern University | private not-for-profit educational institution, university | Boston | 1898 |
| Northern Air Cargo | airline | Anchorage | 1956 |
| Northern Arizona University | public educational institution of the United States, open-access publisher, public research university | — | 1899 |
| Northern Illinois University | public educational institution of the United States, university, normal school | DeKalb | 1895 |
| Northern Kentucky University | public educational institution of the United States, public university | — | 1968 |
| Northwest Airlines | airline | Eagan | 1926 |
| Northwestern Mutual | business | Milwaukee | 1857 |
| Norwich University | military university, private not-for-profit educational institution | — | 1819 |
| Nova Southeastern University | private not-for-profit educational institution, university, open-access publisher | Davie | 1964 |
| NovaKid | privately held company, software, company | San Francisco | 2017 |
| NovaLogic | video game developer | Agoura Hills | 1985 |
| NPR | radio network, public broadcaster, online newspaper without paywall, nonprofit organization, nonprofit corporation | Washington, D.C. | February 26, 1970 |
| NRG Energy | business, public company | Princeton, Houston | 1905 |
| NStigate Games | video game developer | Marin County | March 1998 |
| Nu Skin Enterprises | multi-level marketing company, public company | Provo | 1984 |
| NXIVM | cult, corporation, multi-level marketing company | Albany | July 20, 1998 |
| NZXT | business | Los Angeles | 2004 |