Ultab is a mythological demonic figure in Ferengi culture. Ultab is one of several spirits the Ferengi people believe in.

When a Ferengi individual experiences economic hardship, it is said they have been visited by Ultab. In 2371, Rom told Quark that Quark's troubles could be due to his being visited by Ultab. (DS9 novel: The Laertian Gamble)