Johann Schmidt may refer to:
- The Red Skull, a fictional Marvel Comics supervillain who was born Johann Schmidt
- Johann Schmidt (pianist), Belgian pianist and laureate of the 1987 Queen Elisabeth Music Competition
- Johann Schmidt (neurologist), neurologist, preceded by Marc Dax
- Johann Schmidt (organist), organist who instructed Johann Peter Kellner in 1720
- Johann Schmidt (historian) (1693 Olomouc–1762 Prague), Moravian historian
- Johann Friedrich Julius Schmidt (1825–1884), German astronomer and geophysicist.
- Johann Georg Schmidt (painter) (c.1685–1748), German painter
- Johann Georg Schmidt (engraver) (1694–1767), German engraver
- Johann George Schmidt (1707–1774), German master builder, architect in Dresden
- Johann Philipp Samuel Schmidt (1779-1853), German composer