| Company | Search On | Records | Category | Sub category |
| Nachman Kramer & Sons Ltd | NachmanKramer | 1 | Materials | Wood |
| Napier and Son Ltd. D. | Napier | 676 | Engine Manufacturers | |
| National Aeronautical Corp | Narco | 13 | Avionics | Aircraft |
| Nardi | Nardi | 1 | Aircraft Manufacturers | Non UK |
| National Aircraft Manufacturing Co | NationalAircraftMfgCo | 9 | Manufacturing | Components |
| National Benzole Co Ltd | NationalBenzole | 84 | Fuel Suppliers | |
| National Fire Protection Co | NationalFire | 4 | Survival Equipment | Fire Safety |
| National Radio Service | NationalRadio | 2 | Avionics | Intercom |
| Navaltum Ltd | Navaltum | 1 | Materials | Alloys |
| Navarro Aircraft Co Ltd | Navarro | 9 | Aircraft Manufacturers | |
| Navy .Royal Navy | NavyRecruit | 136 | Recruitment | NavyRecruit |
| Naylor Brothers (London) Ltd | Naylors | 15 | Finishes | Paints |
| Neale's Aeroplane Works | Neale | 7 | Aircraft Manufacturers | Airships |
| Negretti & Zambra Ltd | NegrettiZambra | 47 | Instrument Manufacturers | Flight Instruments |
| Neil Tool Co Ltd | NeilTool | 1 | Manufacturing | Machine Tools |
| Neon Metal Works | NeonMetal | 1 | Manufacturing | Spinnings |
| Newalls Insulation Company Ltd | NewallsInsulation | 2 | Components | Insulation |
| New Engine (Motor) Co Ltd | NewEngine | 36 | Engine Manufacturers | |
| Newman Crinage & Co | NewmanCrinage | 1 | Manufacturing | Components |
| Newman Industries Ltd | NewmanIndustries | 1 | Manufacturing | Components |
| Newmark Ltd. Louis | Newmark | 37 | Components | Flight Control |
| Newtex Safety Glass Co | Newtex | 1 | Materials | Transparencies |
| New Things Ltd | NewThings | 10 | Models | Flying |
| Newton Chambers & Co Ltd | NewtonChambers | 8 | Health And Safety | Factory |
| Newton Brothers (Derby) Ltd | NewtonDerby | 61 | Components | Electrical |
| Newtons Non-Ferrous | NewtonsNonFerrous | 1 | Manufacturing | Castings |
| New Welbeck Ltd | NewWelbeck | 2 | Engineering Equipment | Vacuum Cleaner |
| New Welding Co | NewWelding | 2 | Fabrication | Welding |
| National Flying Services Ltd | NFS | 89 | Maintenance | Flying School |
| N.Greening & Sons Ltd | NGreening | 3 | Manufacturing | Filters |
| Nicholls & Lewis Ltd | NichollsLewis | 1 | Manufacturing | Sheet Metal Work |
| Nicklin & Co. Bernard | Nicklin | 30 | Materials | Steel |
| National Institute Of Engineering |
NIE | 2 | Training | Correspondence Courses |
| Nieuport & General Aircraft Co Ltd. British | Nieuport | 51 | Aircraft Manufacturers | |
| Nieuwhof, Surie & Co Ltd | NieuwhofSurie | 6 | Chemicals | Adhesives |
| Nihon Aeroplane Manufacturing Co Ltd | Nihon | 15 | Aircraft Manufacturers | Non UK |
| Nissen Buildings Ltd | Nissen | 4 | Structures | Hangars |
| Nitralloy Ltd | Nitralloy | 6 | Materials | Steel |
| Nivex Gauge Ltd | Nivex | 1 | Instrument Manufacturers | Flight Instruments |
| Nobel Chemical Finishes Ltd | Nobel | 13 | Finishes | Paints |
| Nobrac Carbon Ltd | Nobrac | 10 | Materials | Carbon |
| Northern Aluminium Company Ltd | Noral | 185 | Materials | Aluminium |
| Norco Engineering Ltd | Norco | 3 | Aircraft Suppliers | Sales |
| Nord Aviation | Nord | 47 | Aircraft Manufacturers | Non UK |
| Norden. United Technologies | Norden | 1 | Computers | |
| Norgren Ltd. C.A | Norgren | 1 | Engineering Equipment | Filters |
| Normalair Ltd | Normalair | 138 | Components | Controls |
| Normal Propeller Co | NormalPropeller | 4 | Components | Propellers |
| Norman Engineering Co Ltd | Norman | 6 | Engineering Equipment | Jigs |
| Norman Edgar (Western Airways) Ltd | NormanEdgar | 7 | Air Transport | Air Charter |
| Norman & McKnight | NormanMcKnight | 1 | Aeronautical Engineers | |
| Norman Thompson Flight Co Ltd | NormanThompson | 6 | Aircraft Manufacturers | |
| Northair Aviation | NorthairAviation | 2 | Air Transport | Air Charter |
| North American Aviation Inc | NorthAmerican | 41 | Aircraft Manufacturers | Non UK |
| North & Sons Ltd | NorthAndSons | 3 | Components | Magnetos |
| North British Plastics Ltd | NorthBritish | 9 | Materials | Composites |
| The North British Rubber Co Ltd | NorthBritishRubber | 14 | Materials | Thermopalstic Sheeting |
| Nothern Aircraft & Engineering Products Ltd | NorthernAircraft | 7 | Manufacturing | Sheet Metal Work |
| Northern Aircraft Co Ltd | NorthernAircraftSchool | 30 | Aircraft Manufacturers | |
| Northern Executive Aviation Ltd | NorthernExec | 2 | Air Transport | Air Charter |
| Northern Rubber Co Ltd. The | NorthernRubber | 5 | Components | Rubber |
| Northern Machine Screws Ltd | NorthernScrews | 1 | Components | AGS |
| Northey Rotary Compressors Ltd | Northey | 7 | Engineering Equipment | Compressors |
| Northrop Corporation | Northrop | 91 | Aircraft Manufacturers | Non UK |
| North West Engineering Company | NorthWestEng | 1 | Manufacturing | Sheet Metal Work |
| Norton Plastics & Synthetics | NortonPlastics | 4 | Materials | Plastics |
| Norwood Steel Equipment Ltd | NorwoodSteel | 1 | Factory | Logistics |
| Notting Ltd. W. | Notting | 1 | Manufacturing | Grinding |
| Nova-Tech Inc | NovaTech | 1 | Avionics | |
| Novavia | Novavia | 3 | Finishes | Dope |
| Novellon. British Cellulose & Chemical Mfg Co Ltd | Novellon | 3 | Finishes | Dope |
| NSF Ltd | NSF | 8 | Components | Electrical |
| Nuffield Organization. The | Nuffield | 9 | Manufacturing | Components |
