Dáin or Dain can refer to:
In Norse mythology: Dáinn (Norse dwarf) or Dáin, a dwarf Dáinn, one of the four stags of Yggdrasill Dáinn, an elf who introduced the runes to his race according to Hávamál Dáin II Ironfoot, dwarf-king from J. R. R. Tolkien's Middle-earth legendarium Dain (unit), an obsolete unit of measurement in Myanmar equalling ca 3.9 kilometres; see also Bamboo (unit) Dain or Dayan (witch), a type of witch in Indian folklore
See also Dain, a surname Dainn (disambiguation) Dane (disambiguation)