The Sikorsky S-65 is a heavy transport helicopter originally developed for use by the United States Marine Corps, who designated it the CH-53 Sea Stallion.

Much of the design was derived from the Sikorsky S-64. First flight was on 14 October 1964, with deliveries of the CH-53A beginning in 1966 eventually totalling 139.

The US Air Force ordered HH-53B and HH-53C variants for search and rescue work.

The CH-53E Super Stallion is a larger version with three engines, first delivered in 1981.

On special forces missions they often work alongside a MC-130 (a converted C-130 Hercules) that provides C3 and inflight refueling.

Variants

• YCH-53A - two prototypes
• CH-53A - initial production for USMC, 139 built
• RH-53A - mine countermeasures versions, 15 built
• TH-53A - stripped CH-53As used for training
• HH-53B - CH-53A type for USAF search and rescue
• CH-53C - heavy-lift version for USAF, 22 built
• HH-53C - "Super Jolly Green Giant", improved HH-53B for USAF
• S-65C-2 - export version for Austria, later to Israel
• S-65-C3 - export version for Israel
• CH-53D - CH-53A with improved transmission, 124 built
• RH-53D - improved anti-mine version
• VH-53D - two CH-53Ds for USMC VIP transport
• CH-53G - 110 built by VFW under license
• YHH-53H - prototype Pave Low I craft
• HH-53H - Pave Low III night infiltrator
• MH-53H - redesignation of HH-53H
• MH-53J - "Pave Low III Enhanced", several older types converted
• CH-53D Yas'ur 2000 - CH-53D upgraded and improved by the IAI to extend life span beyond 2000

For CH-53E variants see CH-53E Super Stallion.