John Ewing may refer to:
Public officials John Ewing (Indiana politician) (1789–1858), American congressman John Hoge Ewing (1796–1887), American congressman from Pennsylvania John Ewing (diplomat) (1857–1923), American Envoy Extraordinary and Minister Plenipotentiary to Honduras, 1913–1918 John Ewing (Australian politician) (1863–1933), member of Western Australia Legislative Assembly John H. Ewing (1918–2012), American assemblyman and state senator from New Jersey, a/k/a Jack Ewing John Ewing Jr., American politician from Nebraska, elected mayor of Omaha in 2025
Writers John Ewing (pastor) (1732–1802), American university president and sermon writer in Philadelphia John T. Ewing (1856–1926), American historian and university administrator in Michigan John D. Ewing (1892–1952), American journalist, editor and publisher in Louisiana John Ewing (curator), American film historian and reviewer at Cleveland Museum of Art and Cinematheque
Others John C. Ewing (1843–1918), American Civil War Medal of Honor recipient John Ewing (goldminer) (1844–1922), Scottish-born New Zealand pioneer John Ewing (baseball) (1863–1895), American pitcher during 1880s and 1890s John "Streamline" Ewing (1917–2002), American jazz trombonist
Characters John Ross Ewing Jr. (J. R. Ewing), amoral oil baron on 1978 American TV series Dallas, played by Larry Hagman John Ross Ewing Sr. (Jock Ewing), father of J. R. Ewing on Dallas, played by Jim Davis and Dale Midkiff John Ross Ewing III, son of J. R. Ewing on Dallas, played by Omri Katz and Josh Henderson
See also Jon Ewing (1936–2014), Australian stage, film and TV actor and director