Johann Fischer may refer to:
Entertainment Johann Georg Fischer (painter) (1580–1643), German historical painter Johann Fischer (theologian) (1636–1705), German Lutheran theologian Johann Fischer (composer) (1646–1716), German violinist, pianist, and composer of the Baroque era Johann Caspar Ferdinand Fischer (1656–1746), German Baroque composer Johann Christian Fischer (1733–1800), German composer and oboist Johann Ignaz Ludwig Fischer (c. 1745–1825), German opera singer Johann Georg Fischer (1816–1897), German poet and playwright
Science Johann Bernhard Fischer (1685–1772), German doctor, medical adviser to Empress Anna Johann Fischer von Waldheim (1771–1853), German anatomist, entomologist, and paleontologist Johann Conrad Fischer (1773–1854), Swiss metallurgist Johann Nepomuk Fischer (1777–1847), Austrian ophthalmologist Johann Baptist Fischer (1803–1832), German naturalist, zoologist, and botanist Johann Gustav Fischer (1819–1889), German herpetologist
Other Johann Bernhard Fischer von Erlach (1656–1723), Austrian architect, sculptor, and architectural historian Johann Michael Fischer (1692–1766), German architect in the late Baroque period Johann Erhard Fischer (1817–1884), German Lutheran pastor
See also John Fischer (disambiguation) John Fisher (disambiguation) Johannes Fischer (1887–?), German physicist