The Adventures of Kathlyn (1913) is an American motion picture serial released on December 29, 1913, by the Selig Polyscope Company. An adventure serial filmed in Chicago, Illinois, its thirteen episodes were directed by Francis J. Grandon from a story by Harold MacGrath and Gilson Willets and starred Kathlyn Williams as the heroine. Harold MacGrath's novel of the same title was released a few days later in January 1914, so as to be in book stores at the same time as the serial was playing in theaters.

The Adventures of Kathlyn was the second serial ever made by an American film studio, and is considered to be the first of the cliffhanger serials that became enormously popular during the next decade.

The success of the serial spawned a 1916 feature-length film of the same title with basically the same crew and cast.