Ainslee's Magazine was an American literary periodical that began in 1897 as a humor magazine called The Yellow Kid (based on the popular newspaper comic strip character) and shorlty afterwards as The Yellow Book. It was renamed Ainslee's Magazine the following year, and given a new format and numbering. At first Ainslee's was a general-interest magazine, with articles and stories, but in late 1902 it changed to an all-fiction format. At that time its title was also reduced to just Ainslee's.
Among the authors to have their works published in Ainslee's were: Stanley J. Weyman, Bret Harte, Anthony Hope, Stephen Crane, Jack London, some of the earliest stories by O. Henry, Albert Payson Terhune, I.A.R. Wylie, E. Phillips Oppenheim and Francis James Dwyer.
The magazine continued through until December 1926, after which it was merged into Far West Illustrated.