Jötunn, some times anglicized as Jotun (pronounced yōtən), plural: jötnar or Jotnar, is a giant in Norse mythology, a member of a race of nature spirits with superhuman strength, described as standing in opposition to the races of Æsir and Vanir, although they frequently mingled with or were even married to these.

In the recent Marvel (MCU) film series on Thor, the Thunder god travels to the realm of the Jotun.