John Hartman, John Hartmann, or Johnny Hartman may refer to:
People John Hartman (1950–2021), U.S. musician, founding drummer of the Doobie Brothers John Daniel Leinbach Hartman (1865–1953), U.S. Army officer John Hartman (artist) (born 1950), Canadian painter and printmaker John Hartman, a fictional character in the Peter Bunzl book Cogheart Johnny Hartman (1923–1983), U.S. jazz singer John Hartmann (1830–1897), Prussian composer John W. Hartmann (born 1967), U.S. politician John Hartmann, a computer scientist who developed the Hartmann pipeline
Places John T. Hartman Elementary School, Kansas City Public Schools, Kansas City, Missouri, USA
Other uses Johnny Hartman, Johnny Hartman (album), 1977 album by singer Johnny Hartman
See also
Arthur John Hartman (1888–1970), U.S. pilot and planebuilder Michael John Hartmann, a Hong Kong judge John Hartmann Eriksen (1957–2002), Danish soccer player John Hartman Morgan (1876–1955), UK lawyer
John Hardman (disambiguation) Johan Hartmann (disambiguation) Hartmann Hartman John (disambiguation)