Nick Chopper, the Tin Woodman, is a character in the fictional Land of Oz created by American author L. Frank Baum. He first appeared in his 1900 book The Wonderful Wizard of Oz and reappeared in many other subsequent Oz books in the series. In late 19th-century America, men made out of various tin pieces were used in advertising and political cartoons. Baum, who was editing a magazine on decorating shop windows when he wrote The Wonderful Wizard of Oz, was inspired to invent the Tin Woodman by a figure he had built out of metal parts for a shop display.

The Land of Oz is a magical country introduced in the 1900 children's novel The Wonderful Wizard of Oz written by L. Frank Baum and illustrated by W. W. Denslow.