Don Markstein's Toonopedia

Don Markstein's Toonopedia (subtitled A Vast Repository of Toonological Knowledge) is an online encyclopedia of print cartoons, comic strips and animation, initiated February 13, 2001. Donald D. Markstein, the sole writer and editor of Toonopedia, termed it "the world's first hypertext encyclopedia of toons" and stated, "The basic idea is to cover the entire spectrum of American cartoonery."

Markstein began the project during 1999 with several earlier titles: he changed Don's Cartoon Encyberpedia (1999) to Don Markstein's Cartoonopedia (2000) after learning the word "Encyberpedia" had been trademarked. During 2001, he settled on his final title, noting, "Decided (after thinking about it for several weeks) to change the name of the site to Don Markstein's Toonopedia, rather than Cartoonopedia. Better rhythm in the name, plus 'toon' is probably a more apt word, in modern parlance, than 'cartoon', for what I'm doing."