Hayn may refer to:

Places Hayn, Saxony-Anhalt, Germany Hayn, old name for Großenhain, Germany , Germany , Germany Jabal al-ʿHayn, Saudi Arabia

Other Hayn (crater), a lunar crater Friedrich Hayn (1863–1928), German astronomer Hans Hayn (1896–1934), German officer and politician

See also Hain (disambiguation)