Kevin Siembieda (born April 2, 1956) is an American artist, writer, designer, and publisher of role-playing games, as well as being the founder and president of Palladium Books.
Some of the role-playing games Siembieda helped produce include Teenage Mutant Ninja Turtles & Other Strangeness (1985), Robotech RPG (1986), After The Bomb (1986), and Rifts (1990).
Siembieda is also an artist, best known for occasionally illustrating Palladium Books' products. Prior to 1973, he started the now-defunct Megaton Publications in Detroit, Michigan with Alex Marciniszyn. It published a science fiction fanzine called Nightspawn in 1973 and a digest style title called A + Plus Comics in 1977. He also contributed art and cartography to several early Judges Guild products, the Traveller and Dungeons & Dragons lines.