Ivan Reis (born 1976) is a Brazilian comics artist best known for his work with American publishers. According to his frequent collaborator Geoff Johns, his drawing style resembles that of Alan Davis and Neal Adams, and his name is tied to series such as Action Comics, Green Lantern and Aquaman.
Before his international career, he spent three years working for Maurício de Sousa in Brazil. His breakthrough in the American market came with Dark Horse Comics, where he was the regular artist on Ghost from issue #17 until the series ended with issue #36, and he also worked on The Mask, Time Cop and Xena. He later worked for Lightning Comics and Vertigo, and became better known through Lady Death at Chaos! and CrossGen.
Since 2004 he has worked for DC Comics on titles such as Action Comics, Teen Titans and Superman. He pencilled Green Lantern from issue #10, then moved to the Blackest Night and Brightest Day limited series in 2009 and 2010. He became the regular penciller of Johns's Aquaman, and later joined Justice League, replacing Jim Lee. With Johns, he introduced the Crime Syndicate of America into the New 52 continuity.
His legacy lies largely in his influence on superhero comics over the past two decades. In December 2023 he announced that he was leaving DC Comics after twenty years with the publisher, and he joined the Ghost Machine project to publish creator-owned comics through Image Comics.