IM or Im may refer to:
Im (Korean surname)
Im or Rim is a common Korean family name equivalent either to the Chinese surname Lin or Ren depending on the clan branch.
In Norse mythology, Im or Imr is a giant and the son of Vafthrudnir. According to stanza 5 of the poem Vafthrudnismal from the Poetic Edda:"Then Odin went to try the wisdom of the all-wise giant [Vafthrudnir]; to the hall he came which Im's father owned; Odin went inside." — Larrington trans.
Im is also mentioned in a list of giants in the Skaldskaparmal section of the Prose Edda by Snorri Sturluson.