John Stange(r) Heiss Oscar Asche (24 January 1871 – 23 March 1936), better known as Oscar Asche, was an Australian actor, director, and writer, best known for having written, directed, and acted in the record-breaking musical Chu Chin Chow, both on stage and film, and for acting in, directing, or producing many Shakespeare plays and successful musicals.

After studying acting in Norway and London, Asche made his London stage debut in 1893 and soon joined the F R Benson Company, where he remained for eight years, playing more than a hundred roles including important Shakespearean parts. He married the actress Lily Brayton in 1898, and the two were often paired onstage for many years. He played Maldonado in Arthur Wing Pinero's Iris in the West End in 1901, his first important part in modern comedy. He repeated the role on Broadway the following year, and then joined Herbert Beerbohm Tree's theatre company in London in 1902, playing more Shakespearean roles over the next few years.

Asche and his wife became managers of the Adelphi Theatre in 1904 and His Majesty's Theatre in 1907; he made his first tour of Australia in 1909–10, and was much moved by his reception in his native land. In 1911 Edward Knoblock wrote the play Kismet for him; Asche revised and shortened it, and the production enjoyed great success in London and on tour with Asche in the leading role of Hajj.

Asche most famously wrote and produced Chu Chin Chow, starring himself and his wife, which ran for an unprecedented 2,238 performances, from 31 August 1916 to 22 July 1921. During the run, among other projects, he directed the hit London production of The Maid of the Mountains. From 1922 to 1924 he toured in Australia with the J C Williamson company. As a result of his high-spending lifestyle, he was declared bankrupt in 1926. Though his success as a producer waned, he continued to direct and act, including in several films, until the mid-1930s.