X-Men Unlimited is the name of several comic book titles published by Marvel Comics.

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The purpose of this title was to run stories that fit between the main X-Men comics.^{[citation needed]} The stories included all characters (heroes and villains) from the X-titles, and the issues were collections of short stories. An anthology title, these stories focus less on the main continuity and more on peripheral events occurring with the X-Men characters. The first two series ran from 1993 to 2003 and the Infinity Comics launched in 2021.

This title allowed new and lesser-known writers and artists to write and draw X-Men comics. The comics were also usually self-contained stories; with the exception of a tie-in to the Onslaught crossover. This was particularly unique during the late 1990s when most X-Men titles frequently had story arcs that were several issues long. It ran as a quarterly feature releasing four issues per year until late 2002 when it converted into a monthly title.

The second series ran from early 2004 to early 2006. The series' final issue was in June 2006. Each issue contained two short self-contained stories; in almost every case each story would focus specifically on one character, giving an in-depth glimpse into their psyche.

X-Men Unlimited Infinity Comic is part of the Reign of X line of the X-Men comics featuring a rotating adventures of the Krakoan mutants, with the first arc featuring Wolverine's battle against A.I.M. This title is released in weekly chapters exclusively in Marvel's Infinity Comics.^[1] It later became part of the Destiny of X and Fall of X line.