Irtok is a star system, a type G yellow star located in the space of the galaxy's Alpha Quadrant, in the borders of the Ferengi Alliance. (ST reference: Star Charts)

In 2374, Kira Nerys told Quark and Rom that if the Dominion had plans to invade Ferenginar, they would have to conquer Irtok and Clarus first. (DS9 episode: "Profit and Lace")