BD Art Museum - Presents exhibitions related to comic strips, as well as trading and selling original artwork. [In French]
Cartoon Bank - Original panel cartoon art from The New Yorker.
Casablanca Comics - Mostly modern original comic art, including a large selection by Paul Pelletier.
Catskill Comics - Offering sales of original art and representing artists such as Mike Grell, Ron Frenz, Charles Barnett and others for commissions.
Chaos City Comics - Authorized dealer for Dave Gibbons (Watchmmen, Martha Washington) art.
ChurchCartoons.com - Christian and religious cartoons for church bulletins and newsletters, offers samples and rates.
Cochran, Russ: Comic Art Auction - The auction itself is not online, but contact information here is worth adding because of the focus on EC Comics, Hal Foster, and Frank Frazetta artwork.
Colan, Gene - Original art and commissions from renowned Marvel and DC artist Gene Colan. Also offers art instruction via correspondence.
Colorguides.com - Marvel and DC Comics color guides colorist artwork bought and sold! (Note: Color guides are not the original pen and ink originals for the books, which are typically black and white line art, but are a separate step in the production of a printed comic.)
Comic Art and Graffix Gallery - Offering a large selection of art ranging with a focus on Golden age comic book originals, the Gallery also provides links to artist biographies and modestly priced collection of comics on CD-ROM.
Comic Art Collective - A forum for fans to view and buy art directly from alternative comix artists including Rick Altergott, Peter Bagge, Jim Blanchard, Daniel Clowes, Mary Fleener, Dean Haspiel, Tony Millionaire, Pat Moriarity, Eric Reynolds, Johnny Ryan, Kevin Scalzo, Pete Sickman-Garner, and Kurt Wolfgang.
Comic Art Source - Modern comic book artwork, included sketches and painted pages.
Comic Book Art Dot Com - Comic Book Art Dot Com offers comic book art ranging from classic to modern in all price ranges.
Comic Book Art Gallery - Large selection of comic book art from the 1970s and 1980s. Will trade for splashes and cover art.
ComicArtLinks.com - There's plenty of room on the web for listings of comic art sites. If you don't see a link here on the Open Directory you may want to check out ComicArtLinks.com.
Comicart-ltd.com - Comic book art from the silver to the modern age. Representing Gene Ha, Michael T. Gilbert, and Denis Fujitake.
Comicartville - An eclectic mix of old and new comic book and strip art, plus articles by comics professionals and fans.
Comic-Gallery.de - Gallery for comic art. Mostly modern, dealer is based in Germany.
ComicLink.Com - Auction house and exchange for Golden Age, Silver Age, Bronze Age and CGC Graded comic books and original art, specializing in 1930's thru 1970's.
Comicon.com - A direct line to scores of contemporary artists, many of whom offer their work directly from their "booth" at the convention.
Comics Fun - An eclectic selection of mostly modern comic book art.
Cooper, Dave - Artwork from Suckle, Weasel, and painting commissions by Dave Cooper.