Khun

Khun may refer to:


 * Khun (คูน, long vowel, middle tone) is the colloquial Thai name for the Golden Shower Tree.
 * Khun (courtesy title) (คุณ, short vowel, middle tone) is a common Thai honorific
 * Khun (noble title) (ขุน, short vowel, rising tone) is a former royally bestowed Thai noble title
 * Khun, Iran, a village in Bushehr Province, Iran