Clarence Blakiston (23 April 1864 – 21 March 1943) was a British film and stage actor, comedian and singer who during his career across five decades played the title role in the Sherlock Holmes parody Sheerluck Jones, or Why D’Gillette Him Off at Terry's Theatre (1901–02) which ran for 138 performances and who appeared in the original production of The Admirable Crichton at the Duke of York's Theatre in 1902.