Thomas Nast (; German: [nast]; September 27, 1840 December 7, 1902) was a German-born American caricaturist and editorial cartoonist often considered to be the "Father of the American Cartoon". He was a critic of Democratic Representative "Boss" Tweed and the Tammany Hall Democratic party political machine. Among his notable works were the creation of the modern version of Santa Claus (based on the traditional German figures of Sankt Nikolaus and Weihnachtsmann) and the political symbol of the elephant for the Republican Party (GOP). Contrary to popular belief, Nast did not create Uncle Sam (the male personification of the United States Federal Government), Columbia (the female personification of American values), or the Democratic donkey, although he did popularize those symbols through his artwork. Nast was associated with the magazine Harper's Weekly from 1859 to 1860 and from 1862 until 1886.

A political cartoon, a type of editorial cartoon, is a cartoon graphic with caricatures of public figures, expressing the artist's opinion. An artist who writes and draws such images is known as an editorial cartoonist. They typically combine artistic skill, hyperbole and satire in order to question authority and draw attention to corruption, political violence and other social ills.Developed in England in the latter part of the 18th century, the political cartoon was pioneered by James Gillray, although his and others in the flourishing English industry were sold as individual prints in print shops. Founded in 1841, the British periodical Punch appropriated the term cartoon to refer to its political cartoons, which led to the term's widespread use.