Adam Hughes (born May 5, 1967) is an American comics artist and illustrator best known to American comic book readers for his renderings of pinup-style female characters, and his cover work on titles such as Wonder Woman and Catwoman. He is known as one of comics' foremost cheesecake artists, and one of the best known and most distinctive comic book cover artists. Throughout his career Hughes has provided illustration work for companies such as DC Comics, Marvel Comics, Dark Horse Comics, Lucasfilm, Warner Bros. Pictures, Playboy magazine, Joss Whedon's Mutant Enemy Productions, and Sideshow Collectibles. He is also a fixture at comics conventions where his commissioned sketches command long lines.

Adam Hughes was born on May 5, 1967 in Riverside Township, New Jersey and grew up in Florence, where he attended a private elementary school. He stayed in Florence until he was 24.

Hughes, who had no formal training in art, began his career in 1987. His first comic book work was a pinup in Eagle #6. He penciled, inked, and lettered, two short stories and the first issue of Death Hawk, created by Mark Ellis. In 1988 Hughes became the penciller on writer Mike W. Barr's detective series Maze Agency, as his portfolio bore samples of both that series and Mike Gustovich's Justice Machine. Maze Agency, published by Comico, and edited by Michael Eury, became Hughes' first regular series and his first color work. Despite wanting to draw action-oriented superhero stories at the time, he credits his work on Maze Agency, whose scripts Barr composed in the full script format, with improving his skill and confidence at storytelling. In a 2004 interview, he stated that this work also developed his preference for character-oriented stories over action-oriented ones, both as an artist and a writer. Hughes' interior pencils were inked by Eury's longtime friend Rick Magyar, and because Hughes aspired to ink his own work one day, he took Barr's suggestion that he produce pinups on each issue's back cover as an advertisement for the next issue to practice inking his own pencils. It was around this time that Hughes switched to inking with a brush on the advice of Dave Stevens when Stevens looked at Hughes' samples. Hughes stayed on the series for a year, though he took a month off during this run to provide the pencils on Comico's issue #12 of Bill Willingham's series Elementals.

After two years of providing background art or interior pencils on independent books, writer/artist Willingham introduced Hughes to Andy Helfer, the editor on the DC Comics series Justice League America. Helfer was impressed by Hughes' portfolio and asked Hughes to contact him when his contract expired. A few months later, after Comico went out of business, Helfer contacted Hughes, hiring him initially to draw inventory covers for issues like Mister Miracle #19, one of Hughes' favorite creations by Jack Kirby. Hughes was then made the regular artist on Justice League America, with issue #31 being his first published DC Comics work. At the time he began on that book, he was still working at a comics shop two days a week. He continued doing covers and interior art on the title for two years, before switching to providing covers only.

In February 1992, at the age of 24, Hughes moved to Atlanta, Georgia to join Gaijin Studios, believing that working more closely alongside fellow artists would improve his own skills. Hughes stayed with Gaijin Studios for 12 years. That same year, he penciled Comics' Greatest World: Arcadia #3 for Dark Horse Comics, which featured the first appearance of the supernatural character Ghost. He drew that character subsequently in the 1994 one-shot Ghost Special. When that character was given her own series in 1995, Hughes penciled the first three-issue storyline, "Arcadia Nocturne".

From 1994 to 1995, Hughes drew the satirical storyline "Young Captain Adventure", which appeared in the first several issues of the adult comics anthology magazine Penthouse Comix. Hughes also provided a painted cover for issue #2, and a pinup in issue #26 in 1997. In a 2011 interview, he indicated that while he did not regret that work, he felt shame at the time he produced it, as he feared it might end his future prospects with companies like Marvel Comics and DC Comics, and because he feels that depicting full nudity is less fulfilling than merely suggestive art. Hughes explains:

I firmly believe that drawing a fully clothed, beautiful woman is more sensuous than a completely naked, laying on a table getting ready to go in for a CAT scan. I firmly think that it's what you hint and suggest—that is more attractive—and that goes for both men and women. When you go into full nudity, and swing for the fences with the nudity, it can be titillating at first, but after a while you get kind of tired and kind of spent and decide "Hey, you know what, I am just going to go watch the ball game." I think that you need to have the mystery, and that layer to be peeled away so that the interest remains there.

In 1995, Hughes wrote and illustrated the 1996 two-issue miniseries, Gen¹³: Ordinary Heroes from WildStorm, his first writing assignment. Because he did that at the WildStorm offices in La Jolla, California, he spent evenings in the suite where the studio's books were colored, where he learned how to color with Photoshop from colorists Homer Reyes, Ben Dimagmaliw and Laura Martin.