Douglas "Doug" Mahnke is an American comic book artist and penciller. He embarked on a love affair with comics at the age of five, having received a pile of Spider-Man issues from a rugby-playing college student named Mike who lived in his basement. A consistent interest in the medium, coupled with some art skill, landed Mahnke a job drawing comics for Dark Horse at the age of 24.

His first gig was illustrating a moody detective one-shot entitled Homicide written by John Arcudi. The two went on to collaborate on Dark Horse's The Mask and their creator-owned series Major Bummer, originally published by DC.

Since then, Mahnke has worked almost exclusively for DC on a wide variety of titles, including Superman: The Man Of Steel; JLA; Justice League; Batman; Final Crisis; and Green Lantern.