Creig Valentine Flessel (February 2, 1912 – July 17, 2008)[2] was an American comic book artist and an illustrator and cartoonist for magazines ranging from Boys' Life to Playboy.

[7]In 1936, Flessel applied for a position with the advertising agency Johnstone and Cushing, and the firm, feeling he needed more experience, recommended him as an assistant to cartoonist John H. Striebel on the newspaper comic strip Dixie Dugan.

[7] Flessel also assisted Streibel with advertising art featuring the humorous radio program characters Vic and Sade, who appeared in Farina Wheat cereal print ads.

Flessel next found work with the major advertising agency Johnstone and Cushing, illustrating ads for Nestle Toll House cookies, General Foods, Raisin Bran, Eveready batteries, the Nehi Beverage Company's R.C.

In 1943, when Sullivan formed his own comic book publishing company, Magazine Enterprises, Flessel signed on as associate editor.

Flessel's final regular comic-book work was penciling and inking the 62⁄3-page story "The Flying Girl of Smallville" in Superboy #72 (April 1959).

[8] Beginning in 1960, Flessel drew a Hall Syndicate comic strip about a young minister, David Crane, created by Ed Dodd in 1956 and originally produced by artist Win Mortimer and writer Hart Spence.

[13] Like his friend Jack Cole, creator of Plastic Man, Flessel also regularly contributed cartoons to Playboy magazine, including a series titled "The Adventures of Baron Furstinbed".

[15] In 2000, Flessel and his wife Marie moved from the East Coast to Mill Valley, California, where he continued to create art for local events and talent shows.

[16] Their son, Peter Flessel, is an environmental engineer, and their daughter, Eugenie Fernandes, is a book illustrator and author in Ontario.

Flessel is also mentioned in Michael Chabon's 2000 novel The Amazing Adventures of Kavalier & Clay (though his name is misspelled "Craig" in early editions).