"In the British colonies of North America and later the United States, British and Dutch versions of the gift-giver merged further. For example, in Washington Irving's History of New York, (1809), Sinterklaas was Americanized into "Santa Claus" but lost his bishop's apparel, and was at first pictured as a thick-bellied Dutch sailor with a pipe in a green winter coat. Irving's book was a lampoon of the Dutch culture of New York, and much of this portrait is his joking invention."
Thomas Nast immortalized Santa Claus with an illustration for the January 3, 1863 issue of Harper's Weekly. Note that Santa is dressed in an American flag, and has a puppet with the name "Jeff" written on it, reflecting its Civil War context.
"Modern ideas of Santa Claus seemingly became canon after the publication of the poem "A Visit From St. Nicholas" (better known today as "The Night Before Christmas") in the Troy, New York, Sentinel on December 23, 1823 anonymously; the poem was later attributed to Clement Clarke Moore. In this poem Santa is established as a heavyset man with eight reindeer (who are named for the first time). One of the first artists to define Santa Claus's modern image was Thomas Nast, an American cartoonist of the 19th century. In 1863, a picture of Santa illustrated by Nast appeared in Harper's Weekly."
Santa Claus portrayed by children's television producer Jonathan Meath
"By the end of the 20th century, the reality of mass mechanized production became more fully accepted by the Western public. That shift was reflected in the modern depiction of Santa's residence—now often humorously portrayed as a fully mechanized production and distribution facility, equipped with the latest manufacturing technology, and overseen by the elves with Santa and Mrs. Claus as executives and/or managers."