The NHIndustries NH90 is a medium-sized, twin-engine, multi-role military helicopter. It was developed in response to NATO requirements for a battlefield helicopter which would also be capable of being operated in naval environments. The NH90 was developed and is manufactured by NHIndustries, a collaborative company owned by Airbus Helicopters, Leonardo (formerly AgustaWestland) and Fokker Aerostructures. The first prototype conducted its maiden flight in December 1995; the type first entered operational service in 2007. As of June 2022, the NH90 has logged 327,053 flight hours in the armed forces of thirteen countries.

The NH90 is the first production helicopter to feature entirely fly-by-wire flight controls. There are two main variants, the Tactical Transport Helicopter (TTH) for army use and the navalised NATO Frigate Helicopter (NFH); each customer typically has various alterations and customisations made to their own NH90 fleets, such as different weapons, sensors, and cabin arrangements, to meet their own specific requirements.

Since its introduction into service, the NH90 has suffered several technical issues, which have delayed active deployment of the type by some operators. In 2022 Norway terminated the program and demanded a full refund, while Australia decided to retire the type 10 years ahead of schedule.