John Celardo (born December 27, 1918, on Staten Island, New York City) is a comic strip artist.
After studying at the Art Students League of New York and the New York School of Industrial Arts he began his professional contributing sports cartoons to Street & Smith.He then drifted into comic books, working among other places at the Eisner-Iger shop, before going freelance. In the early 1950s, he succeeded Bob Lubbers as illustrator of the Tarzan comic strip, which he continued on until Russ Manning took it over in the 1960s. He then succeeded Joe Kubert on Tales of the Green Beret and worked on Buz Sawyer in the 1980s.
During the 1960s, he also did artwork for Topps Chewing Gum.