List of Famous people named Johann

Johann Graf is an Austrian billionaire businessman, the founder and owner of Novomatic, an Austrian gambling company.

Johann Hermann Wolfgang Mulzer is a German organic chemist, best known for his work in total synthesis. Since 1996, he has been a professor of chemistry at the University of Vienna.

Johann Jacob Baeyer was a German geodesist and a lieutenant-general in the Royal Prussian Army. He was the first director of the Royal Prussian Geodetic Institute and is regarded as the founder of the International Association of Geodesy. He was the father of the Nobel Prize–winning chemist Adolf von Baeyer. Baeyer was a Lutheran.

John IV, Count of Sponheim-Starkenburg was a German nobleman. He ruled the county of Sponheim from 1398 until his death.

Johann Christoph Altnickol, or Altnikol, was a German pipe organ player, bass singer, and composer. He was a son-in-law and copyist of Johann Sebastian Bach.

Johann Peter Langer, after 1808, von Langer was a German painter, engraver and wallpaper designer.