Johanne Hartmann

Johanne, Johannes, Johan, or Johanes Hartmann may refer to:


 * Johannes Hartmann (1568–1631), German chemist
 * Johannes Franz Hartmann (1865–1936), German physicist and astronomer
 * Johann Hartmann (1726–1793), Danish composer
 * Johan Ernst Hartmann (1770–1844), Danish composer
 * Johan Peter Emilius Hartmann (1805–1900), Danish composer