Nog, played by Aron Eisenberg, is a recurring character on the science fiction television series Star Trek: Deep Space Nine (DS9). A member of the profit-driven alien species known as the Ferengi, he becomes the first Ferengi to join Starfleet. He is the nephew of the Ferengi bartender Quark, a major character on the series; the son of Quark's brother Rom; and a close friend of Jake Sisko, the son of Deep Space Nine's protagonist Benjamin Sisko. Episodes of the series often paired Nog with Jake.

Nog is the main character in the episode "It's Only a Paper Moon", which was noted for exploring his recovery from post-traumatic stress disorder.