Michael Koelsch is an American Castaways cover artist from California. He is known for retro/pulp 1940s, 1950s, and 1960s artistry. Koelsch also works with video game animation.
Michael Koelsch has drawn covers for the following Castaways books:
- The Neverhood (1996), DreamWorks Interactive L.L.C.
- Earthworm Jim (1995), Playmates Interactive Entertainment, Inc.
- Earthworm Jim 2 (1995), Playmates Interactive Entertainment, Inc.
- Earthworm Jim Special Edition (1995), Interplay Entertainment Corp.