Ultimate Iron Man (Tony Stark) is a Marvel Comics superhero in the Ultimate Marvel Universe. Based on the Marvel Universe Iron Man, he debuted in Ultimate Marvel Team-Up in a story written by Brian Michael Bendis and drawn by Mike Allred, before becoming one of the major characters in Mark Millar and Bryan Hitch 's The Ultimates.

Like his original Marvel Universe counterpart, Ultimate Iron Man is plagued by both a drinking problem and a life threatening illness, in this case an inoperable brain tumor, which is his motivation for his many acts of philanthropy. He is also an extremely wealthy business tycoon and inventor. Millar chose to imbue Tony's character with an air of arrogance, and he ends up reading more like a thrillseeking playboy than a scientist, as he does in the 616 universe.

Recently, Ultimate Iron Man asked Ultimate Black Widow (Natasha Romanova) to marry him, and she has accepted.

Orson Scott Card is writing two five-issue Ultimate Iron Man miniseries, and as of the first issue of the first mini, it appears that Tony Stark is a genius because of an accident his mother suffered while she was carrying him; his hyperaccelerated brain and nervous tissue growth is also causing him constant, chronic pain, which is why he drinks so much.