Bell 204: Bell Helicopters company designation, covering aircraft from the XH-40, YH-40 prototypes to the UH-1A, UH-1B, UH-1C, UH-1E, UH-1F, HH-1K, UH-1L, UH-1P and UH-1M production aircraft.

Agusta-Bell AB 204: Military utility transport helicopter.
Built under license in Italy by Agusta.

Agusta-Bell AB 204AS: Anti-submarine warfare, anti-shipping version of the AB 204 helicopter.

Fuji-Bell 204B-2: Military utility transport helicopter.
Built under license in Japan by Fuji Heavy Industries.
Used by the Japan Ground Self-Defense Force under the name Hiyodori.

Bell 205: Bell Helicopters company designation of the UH-1D and UH-1H helicopters.

Bell 205A-1: Military utility transport helicopter version, initial version based on the UH-1H.
Bell 205A-1A: As 205A-1, but with armament hardpoints and military avionics.
 Produced specifically for Israeli contract.

Agusta-Bell 205: Military utility transport helicopter.
Built under license in Italy by Agusta.

AIDC UH-1H: Military utility transport helicopter.
Built under license in Taiwan by Aerospace Industrial Development Corporation.

Dornier UH-1D: Military utility transport helicopter.
Built under license in Germany by Dornier Flugzeugwerke.

UH-1G: Unofficial name applied locally to at least one armed UH-1H by the Khmer Air Force in Cambodia.

Fuji-Bell 205A-1: Military utility transport helicopter.
Built under licence in Japan by Fuji.
Used by the Japanese Ground Self Defense Force under the designation HU-1H.
UH-1J: An improved Japanese version of the UH-1H built under license in Japan by Fuji Heavy Industries was locally given the designation UH-1J. Among improvements were an Allison T53-L-703 turboshaft engine providing 1,343 kW (1,800 shp), a vibration-reduction system, infrared countermeasures, and a night-vision-goggle (NVG) compatible cockpit.

Bell 211 Huey Tug With up-rated dynamic system and larger wide chord blades, the Bell 211 was offered for use as the US Army's prime artillery mover, but not taken up.

Bell Huey II: A modified and re-engined UH-1H, improvements were an Allison T53-L-703 turboshaft engine providing 1,343 kW (1,800 shp), a vibration-reduction system, infrared countermeasures, and a night-vision-goggle (NVG) compatible cockpit.significantly upgrading its performance, and its cost-effectiveness.
Currently offered by Bell in cooperation with the Philippine Air Force to all current military users of the type.

UH-1/T700 Ultra Huey: Upgraded commercial version, fitted with a 1,400-kW (1900-shp) General Electric T700-GE-701C turboshaft engine.
Bell 204: Bell Helicopters company designation, covering aircraft from the XH-40, YH-40 prototypes to the UH-1A, UH-1B, UH-1C, UH-1E, UH-1F, HH-1K, UH-1L, UH-1P and UH-1M production aircraft.
Agusta-Bell AB 204: Military utility transport helicopter. Built under license in Italy by Agusta.
Agusta-Bell AB 204AS: Anti-submarine warfare, anti-shipping version of the AB 204 helicopter.
Fuji-Bell 204B-2: Military utility transport helicopter. Built under license in Japan by Fuji Heavy Industries. Used by the Japan Ground Self-Defense Force under the name Hiyodori.
Bell 205: Bell Helicopters company designation of the UH-1D and UH-1H helicopters.
Bell 205A-1: Military utility transport helicopter version, initial version based on the UH-1H.
Bell 205A-1A: As 205A-1, but with armament hardpoints and military avionics.  Produced specifically for Israeli contract.
Agusta-Bell 205: Military utility transport helicopter. Built under license in Italy by Agusta.
AIDC UH-1H: Military utility transport helicopter. Built under license in Taiwan by Aerospace Industrial Development Corporation.
Dornier UH-1D: Military utility transport helicopter. Built under license in Germany by Dornier Flugzeugwerke.
UH-1G: Unofficial name applied locally to at least one armed UH-1H by the Khmer Air Force in Cambodia.
Fuji-Bell 205A-1: Military utility transport helicopter. Built under licence in Japan by Fuji. Used by the Japanese Ground Self Defense Force under the designation HU-1H.
UH-1J: An improved Japanese version of the UH-1H built under license in Japan by Fuji Heavy Industries was locally given the designation UH-1J. Among improvements were an Allison T53-L-703 turboshaft engine providing 1,343 kW (1,800 shp), a vibration-reduction system, infrared countermeasures, and a night-vision-goggle (NVG) compatible cockpit.
Bell 211 Huey Tug With up-rated dynamic system and larger wide chord blades, the Bell 211 was offered for use as the US Army's prime artillery mover, but not taken up.
Bell Huey II: A modified and re-engined UH-1H, improvements were an Allison T53-L-703 turboshaft engine providing 1,343 kW (1,800 shp), a vibration-reduction system, infrared countermeasures, and a night-vision-goggle (NVG) compatible cockpit.significantly upgrading its performance, and its cost-effectiveness. Currently offered by Bell in cooperation with the Philippine Air Force to all current military users of the type.
UH-1/T700 Ultra Huey: Upgraded commercial version, fitted with a 1,400-kW (1900-shp) General Electric T700-GE-701C turboshaft engine.
Bell UH-1 Iroquois