Gerald John Dumas (June 6, 1930 – November 12, 2016) was an American cartoonist, best known for his Sam and Silo comic strip.

Born in Detroit, Dumas started drawing cartoons when he was nine years old.

In 1954, after serving in the Air Force and earning a degree in English from Arizona State University, he worked with cartoonist Walt Ditzen in Phoenix and contributed drawings to the State Press.

In 1956 he moved to Greenwich, Connecticut to work for Mort Walker as a gag writer and illustrator on the comic strips Hi and Lois and Beetle Bailey.

In addition to his comic strip work, Dumas created numerous illustrations and cartoons.