Heimdall or Heimdallr, is a god in Norse mythology.

Heimdall may also refer to:

Crater Heimdall (crater), a crater on Callisto

Fiction Heimdall (character), a comic book character based on the god Heimdall, an Asgard character in Stargate SG-1 Heimdall (The Hitchhiker's Guide to the Galaxy), a character in And Another Thing... by Eoin Colfer Heimdall, a character in the anime and manga The Mythical Detective Loki Ragnarok

Video games Heimdall (video game), 1991 Heimdall 2, the 1994 sequel Heimdall, a fictional aircraft carrier in Carrier Heimdallr, a fictional city featured in the Trails series

Software Heimdall (software), software used for flashing and debugging Android handsets and tablets made by Samsung

See also Heimdal (disambiguation)