Collier's Weekly was an American magazine founded by Peter Fenelon Collier and published from 1888 to 1957.
As a result of Peter Collier's pioneering investigative journalism, Collier's Weekly established a reputation as a proponent of social reform. When attempts by various companies to sue Collier ended in failure, other magazines became involved in what Theodore Roosevelt described as "muckraking journalism."
Leading illustrators and cartoonists contributed to Collier's, including Charles Addams, Carl Anderson, Stan and Jan Berenstain, Sam Berman, Chesley Bonestell, Howard Chandler Christy, Sam Cobean, Harrison Fisher, James Montgomery Flagg, Robert Fawcett, A. B. Frost, Dave Gerard, Denver Gillen, Vernon Grant, Jay Irving, Crockett Johnson, E. W. Kemble,Hank Ketcham, Percy Leason, George Lichty, David Low, J. C. Leyendecker, Paul Martin, Bill Mauldin, John Alan Maxwell, John Cullen Murphy, Virgil Partch, Frederic Remington, Mischa Richter, John Sloan, Frederic Dorr Steele, William Steig, Charles Henry "Bill" Sykes, Richard Taylor, Gluyas Williams, Gahan Wilson and Rowland B. Wilson.