Johann Horn
Johann Horn is the name of the following people:
- Johann von Horn (around 1415–1447), Walloon landlord and seneschal
- Johann Horn (theologian) (around 1490–1547), Bohemian theologian, reformer and hymn poet
- Johann Horn (Feldwebel) (around 1770–1800), German sergeant
- Johann Heinrich Horn († 1713), German civil servant
- Johann Jakob von Horn (1776–1852), German major general
- Johann Philipp Jakob von Horn-Goldschmidt (1724–1796), German priest, vicar general in Cologne