The USS Essex was a Constitution-class (Bonhomme Richard sub-type) Federation starship in service in the 23rd century.
In 2267, the Essex was attacked by Orion pirates and suffered heavy damage. (TOS episode: "Journey to Babel")
In 2269, the Essex was under the command of Captain Salar. That year, the crew foiled a Klingon attempt to interfere with the culture of 34 Kraol III. (FASA RPG: Imbalance of Power)
- Note: The FASA RPG supplement, Federation Ship Recognition Manual, gives the Essex's registry as NCC-1719, while the Star Trek Encyclopedia gives the registry as NCC-1727.