Bell 211 – The HueyTug, was a commercial version of the UH-1C with an upgraded transmission, longer main rotor, larger tailboom, strengthened fuselage, stability augmentation system, and a 2,650 shp (1,976 kW) T55-L-7 turboshaft engine.

Bell 212 – Bell Helicopter's company designation for the UH-1N.
Bell 214 Huey Plus – Strengthened development of the Bell 205 airframe with a larger engine; optimized for "hot and high" conditions.
Later developed into the larger, twin-engine Bell 214ST.

Bell 412 – Bell 212 with a four-blade semi-rigid rotor system.

Panha Shabaviz 2-75 – is an Iranian utility helicopter built by the Iranian Helicopter Support and Renewal Company.
It is a reverse engineered version of the Bell 205s which were sold to the government of Mohammad Reza Pahlavi.
The first example was built in 1998 and the type was publicly unveiled the following year.
It has been manufactured locally in Iran since 2002 and is in active service with the Iranian military and government.
It has also been claimed that it can be modified to carry light weaponry.
Bell 211 – The HueyTug, was a commercial version of the UH-1C with an upgraded transmission, longer main rotor, larger tailboom, strengthened fuselage, stability augmentation system, and a 2,650 shp (1,976 kW) T55-L-7 turboshaft engine.
Bell 212 – Bell Helicopter's company designation for the UH-1N.
Bell 214 Huey Plus – Strengthened development of the Bell 205 airframe with a larger engine; optimized for "hot and high" conditions. Later developed into the larger, twin-engine Bell 214ST.
Bell 412 – Bell 212 with a four-blade semi-rigid rotor system.
Panha Shabaviz 2-75 – is an Iranian utility helicopter built by the Iranian Helicopter Support and Renewal Company. It is a reverse engineered version of the Bell 205s which were sold to the government of Mohammad Reza Pahlavi. The first example was built in 1998 and the type was publicly unveiled the following year. It has been manufactured locally in Iran since 2002 and is in active service with the Iranian military and government. It has also been claimed that it can be modified to carry light weaponry.
Bell 204/205