N
- Naglo, Naglo Boots-Werft – Germany
- NAGL System, Weißkirchen in Steiermark, Austria
- NAI, Nanjing Aeronautical Institute – China
- Nakajima, Nakajima Aircraft Company – Japan
- National Aerospace Laboratories, National Aeronautical Laboratory – India
- NAMC (1), Nihon Aeroplane Manufacturing Company Ltd – Japan
- NAMC (1), Nihon Kokuki Seizo KK – Japan
- Nanchang, Nanchang Aircraft Manufacturing Company – China
- Nanjing, Nanjing Light Aircraft Company – China
- Nanjing University, Nanjing University of Aeronautics and Astronautics – China
- Nardi, Nardi Costruzioni Aeronautiche SpA – Italy
- Nash, Nash Aircraft Ltd – United Kingdom
- National Aeronautics, National Aeronautics Company – United States
- National Aircraft Factory No. 2 Stockport United Kingdom
- National Steel, National Steel Corporation Ltd – Canada
- Naval Aircraft Factory, Naval Aircraft Factory – United States
- Naval Air Establishment, Naval Air Establishment – China
- Nervures, Soulom, France
- NIMBUS Srl, NIMBUS Srl – Italy
- Navion, Navion Aircraft Company – United States
- Navion, Navion Aircraft Corporation – United States
- Navion, Navion Rangemaster Aircraft Corporation – United States
- NDN, NDN Aircraft Ltd – United Kingdom
- Neico, Neico Aviation Inc – United States
- NEIVA, Industria Aeronáutica Neiva SA – Brazil
- NEIVA, Sociedade Construtora Aeronáutica Neiva Ltda – Brazil
- Nesmith, Robert E. Nesmith – United States
- Netherland Army Aircraft Factory, Netherland Army Aircraft Factory – Netherlands
- NeuraJet, Senftenbach, Austria
- New Glasair, New Glasair LLC – United States
- New Glasair, New GlaStar LLC – United States
- New Meyers, The New Meyers Aircraft Company – United States
- New PowerChutes, Alberton, Gauteng, South Africa
- New Standard, New Standard Aircraft Company – United States
- New Zealand, New Zealand Aerospace Industries Ltd – New Zealand
- NHI, NH Industries SARL – France/Germany/Italy
- Nicollier, Henri Nicollier – France
- Nieuport, Societe Anonyme des Etablissements Nieuport – France > Nieuport-Astra
- Nieuport-Astra – France > Nieuport-Delage
- Nieuport-Delage – France > Loire-Nieuport
- Nieuport-Macchi – Italy > Macchi
- Nieuport & General/British Nieuport (1916–1920) – United Kingdom
- Nipper, Nipper Aircraft Ltd – United Kingdom
- Nipper, Nipper Kits and Components Ltd – United Kingdom
- Nitsche, LTB Gerhard Nitsche – Germany
- Nitsche, Nitsche Flugzeugbau GmbH – Germany
- Noin, Noin Aéronautique Alpaero – France
- Noorduyn, Noorduyn Aviation Ltd – Canada
- Noorduyn, Noorduyn Norseman Aircraft Ltd – Canada
- Nord, Nord-Aviation, Société Nationale de Constructions Aéronautiques – France, (?-1970) > Aérospatiale
- Nord, Société Nationale de Constructions Aéronautiques du Nord – France
- Nordic, see Norman – Canada
- Nordic Aircraft AS, Kinsarvik, Norway
- Nordflug, Flugzeugbau Nord GmbH – Germany
- Norman, Norman Aviation International Inc – Canada
- Normand Dube, Aviation Normand Dubé Inc – Canada
- North American, North American Aviation Inc – United States, (1928–1966) > Rockwell
- North American Rockwell, North American Rockwell Corporation – United States
- North American Rotorwerks, Tukwila, Washington, United States
- Northern, Northern Aircraft Inc – United States, (?-1959) > Downer
- Northrop, Northrop Aircraft Inc – United States, (1926–1994)
- Northrop, Northrop Corporation – United States
- Northrop Grumman, Northrop Grumman Corporation – United States, (1994–present)
- Nostalgair, Nostalgair Inc – United States
- NST-Machinenbau, Werther, North Rhine-Westphalia, Germany
- Nuri Demirag, Nuri Demirag – Turkey
- Nusantara, PT Industri Pesawat Terbang Nusantara – Indonesia
- Nuventure, NuVenture Aircraft – United States
- Nuwaco, NuWaco Aircraft Company Inc – United States
- NZAI, New Zealand Aerospace Industries – New Zealand