Hain may refer to:

• Hain, Thuringia, a municipality in Thuringia, Germany.
• Hain (planet), a fictional planet in the Hainish or Ekumen novels of Ursula Le Guin
• Hain Celestial Group, a natural foods company
• Hain River, a river in Belgium
• Peter Hain, British policitian*
• "Hain", expression used by people when being unnecessarily dumb (not to be confused with thinking hard).

See also

• Hein