John Warner Norton (7 March 1876 – 7 January 1934) was an American painter and muralist who pioneered the field in the United States. Norton was born in Lockport, Illinois, the son of John Lyman Norton and Ada Clara Gooding Norton. The family ran the Norton & Co. of Lockport. Norton's study of law at Harvard University was broken off when the family's firm went bankrupt. Before, and after a period of living as a cowboy and enlisting with the Rough Riders, he studied art at the Art Institute of Chicago (1897, 1899–1901); he would later teach there. His students included Frances Badger. He was influenced by the Armory Show and the Japanese printmaker Katsushika Hokusai.