Seth is the pen name of Gregory Gallant (born 1962), a Canadian comic book artist and writer.

Seth's first published comics work was as an illustrator on the short-lived series Mister X, but he soon moved to his own series, Palookaville (published by Drawn and Quarterly), which was part of a miniature boom in non-genre alternative comics from Canada in the 1990s. Seth, Chester Brown, and Joe Matt not only also began their own semi-autobiographical series at the same time, but were friends and sometimes depicted each other in their stories. Palookaville began as a low-key chronicle of the artist's daily life, but moved on to longer and more ambitious stories, including what was later collected as the graphic novel It's a Good Life If You Don't Weaken—an apparently autobiographical tale which was actually fiction.

He is currently producing a new long work, Clyde Fans (serialized in Palookaville), the story of two brothers whose trade in electric fans suffers from the invention of air conditioning.

Seth is also a popular magazine illustrator and book designer.