Reuben Garret Lucius Goldberg (July 4th, 1883 – December 7th, 1970) was an American cartoonist, sculptor, author, engineer, and inventor who received a 1948 Pulitzer Prize for his political cartooning. He is best known for his series of popular cartoons depicting Rube Goldberg machines, complex devices that perform simple tasks in indirect, convoluted ways. The British equivalent is Heath Robinson.

The Reuben Award of the National Cartoonists Society is named in his honor. In addition, there are several contests around the world known as Rube Goldberg contests which challenge high school students to make a complex machine perform a simple task.

Goldberg was hired by the city of San Francisco as an anthropologist; however, his fondness for drawing cartoons prevailed, and after just a few months, he quit the city job for a job with the San Francisco Chronicle as a sports cartoonist. The following year, he took a job with the San Francisco Bulletin, where he remained until he moved to New York City in 1907.