Mark O'Hare (born July 18, 1968) is an American cartoonist who created the comic strip Citizen Dog.
O'Hare is well known for his work on animated television shows as a writer and storyboard artist for Rocko's Modern Life, SpongeBob SquarePants, Dexter's Laboratory, The Powerpuff Girls, Hey Arnold!, The Mighty B! and Chowder. He performed storyboard work on The Ren and Stimpy Show. Throughout the run of the series, O'Hare served as the creative director and supervising producer on Camp Lazlo. He is currently a story artist with Illumination Entertainment, contributing to the films Despicable Me, The Lorax, and the sequel Despicable Me 2.
Although accepted into the aeronautical engineering program at Purdue University, O'Hare shifted focus after his sophomore year to study graphic design, later getting acceptance into the character animation program at California Institute of the Arts.
While a student at Purdue University, he drew a strip called Art Gallery for the student newspaper, The Exponent. The comic ran from the autumn of 1987 to the spring of 1990.
O'Hare has been nominated four times for an Emmy from the Academy of Television Arts & Sciences and won his first Emmy in 2007 for "Outstanding Animated Program" on Camp Lazlo and his second in 2008.
- The Dice Cycle (along with C.H. Greenblatt, William Reiss, Darrick Bachman and Michele McCole Moss)
- Gazpacho Moves In (along with C.H. Greenblatt, Darrick Bachman and Michele McCole Moss)