Reuben Garrett Lucius Goldberg (July 4, 1883 – December 7, 1970), known best as Rube Goldberg (), was an American cartoonist, sculptor, author, engineer, and inventor.

Goldberg is best known for his popular cartoons depicting complicated gadgets performing simple tasks in indirect, convoluted ways. The cartoons led to the expression "Rube Goldberg machines" to describe similar gadgets and processes. Goldberg received many honors in his lifetime, including a Pulitzer Prize for political cartooning in 1948, the National Cartoonists Society's Gold T-Square Award in 1955, and the Banshees' Silver Lady Award in 1959. He was a founding member and first president of the National Cartoonists Society, which hosts the annual Reuben Award, honoring the top cartoonist of the year and named after Goldberg, who won the award in 1967. He is the inspiration for international competitions known as Rube Goldberg Machine Contests, which challenge participants to create a complicated machine to perform a simple task.