Kieron Dwyer is an artist and writer who has worked in the comicbook industry since 1987. Known in his early career for popular runs on the monthly Captain America title with writer Mark Gruenwald, Action Comics with David Michelinie, and the Avengers with Kurt Busiek, Dwyer also worked on well-regarded mini-series such as Batman: Dark Knight, Dark City with Peter Milligan, Superman: The Dark Side and Elseworld's Finest, both co-created with writer John Francis Moore.

Dwyer went on to co-create and illustrate a number of independent, creator-owned graphic novels, notably Last of the Independents with Matt Fraction, Remains with Steve Niles, and Night Mary, Sea of Red, and XXXombies all with frequent collaborator Rick Remender. Dwyer was also the driving force behind the cult-classic underground humor comic series, LCD: Lowest Comic Denominator, which is being collected into a trade paperback available from Image Comics in summer 2020.

Since 2006, Dwyer has worked primarily in the advertising industry, drawing storyboards and concept art for numerous high-profile campaigns, including Old Spice, Coca-Cola, KFC, Nike and many more. His eponymous website has many examples of his illustration work.