Johann Mayer may refer to: Johann Tobias Mayer (1752–1830), German physicist Johann Mayer (serial killer) (1886–1923), German serial killer Johann Christoph Andreas Mayer (1747–1801), German anatomist Johann Friedrich Mayer (theologian) (1650–1712), German Lutheran theologian and professor of theology Johann Friedrich Mayer (agriculturist) (1719–1798), German Reformed pastor and agricultural reformer Johann Prokop Mayer (1737–1804), Austrian naturalist and botanist Johann Friedrich Meyer (1705–1765), German chemist Johann Friedrich von Meyer (1772–1849), German translator, politician, and senator of Frankfurt Johann Georg Meyer (1813–1886), German painter Johann Heinrich Meyer (1760–1832), Swiss painter, engraver and art critic Johann Heinrich Meyer (publisher) (1812–1863), German bookseller and publisher Johann Heinrich Gustav Meyer (1816–1877), German landscape architect and garden historian Johann Jakob Meyer (1798–1826), Swiss editor and journalist
See also Johannes Mayer (1893–1963), German general Johannes Meyer (disambiguation)