- K. Rat - Humorous strip about a domestic rat. By Andy Mosier.
- Kaniamania - Daily cartoon by Chris Kania. Also offers Pointcast channel with daily updates.
- Kari & Doug - An archive of cartoons by Dave Mooney.
- Kartoon Factory - Cartoons, and online greeting cards.
- Kastaway - Fun and games in a hidden spaceship near Earth.
- Kat-nap.com - A humorous web comic about the adventures and misadventures of three wacky house cats and there friends. By Greg Collins.
- Katao - An anthology about an average boy. Translated into English.
- Kate's Comics - Features Superhan by Kate Lloyd.
- Kenation Comics - Offers a collection of cartoons and includes projects, a sketch gallery and contact information about the artists.
- Kerfuffle Bunny - A bunny that starts kerfuffles. Humorous comic panel by Joe Conat
- Kim & Jason - Features the daily and weekend cartoon, the cast, an archive, a gallery, ecards and games.
- Kim and Jason - Features character profiles, artwork and archive from creator Jason Kotecki.
- King, Jerry - Features a gallery of cartoons and a portfolio.
- Kitty Hawk - A pulp-adventure comic with a young heroine, set in the 1930s. By Braden Lamb and Vin LaBate.
- Klyde Morris - A series featuring an aviation ant created by Wes Oleszewski poking fun at pilots, airlines, FAA, and aircraft manufacturers.
- Ko Fight Club - A variety of game related and other comics by the artist, collected under this title, includes archived strips.
- The K Chronicles - Humorous comic, often with political overtones. By Keith Knight.
