Delonas graduated from the New York Academy of Art. Delonas is author of the children's bookScuttle's Big Wish, "Sean Delonas: The Ones They Didn't Print and Some of the Ones They Did." Skyhorse Publishing. and Jackie Mason & Raoul Felder's Survival Guide to New York City. His work has also appeared on the cover of another Rupert Murdoch-owned publication, The Weekly Standard. He painted the altartriptych for the Church of St. Agnes in New York.
Controversies
A number of his cartoons have been criticized as "racist, offensive, and misleading." His work has been criticized as "ham-handed", and he has been accused of "churning out malevolent fantasies." He has been called "the worst cartoonist on the planet" by Vanity Fair, which also asked if he was "stupid, racist, or both?" Conversely, Commentary also praised his irreverent visual imagination, and described as "a bizarre cross between Jack Davis of Mad Magazine and Hieronymous Bosch." A 1999 cartoon depicted Louis Farrakhan about to undergo surgery for recently diagnosed cancer, with the surgeons preparing to cut through his neck to remove "the cancerous tumor from Farrakhan's body." A 2001 cartoon showing rival editor Mortimer B. Zuckerman of the New York Daily News sending anthrax to Post editor Col Allan led to sponsor withdrawal. After a photoshopped picture of the Sesame Street muppet Bert standing alongside Osama bin Ladenwent viral when it turned up on a pro-Osama placard, the website which included it was taken down. Referencing this, in the Post, Delonas did a series of depictions of Bert instructing and training Taliban and Al Qaida terrorists. In 2009, two days after a local chimpanzee mauling and one day after legislation was signed into law by President Barack Obama, Delonas depicted two white police officers who just shot and killed a chimpanzee. One officer says, "They'll have to find someone else to write the next stimulus bill." The cartoon was widely criticized as in bad taste and as making a reference to the racial slur of African Americans being portrayed as apes. Protests came from journalists, politicians, police groups, and the public. The Post disputed this interpretation and defended Delonas. The Post apologized "to those who were offended by the image" while in the same statement accusing "some in the media" of seizing on the opportunity for "payback". In 2018, the Albuquerque Journal apologized for publishing a cartoon by Delonas which equated MS-13 gang members with Dreamers. The cartoon was widely criticized, including by both US Senators from New Mexico.