In Norse Mythology, Helreginn ("Ruler over Hel") is a jötunn listed in the þulur section of the Prose Edda book Skáldskaparmál. Other than the name, no additional information about the figure is provided. Rudolf Simek comments that the name is unusual, reasoning that it is unusual for the jötnar to be directly associated with "the underworld."
- Hel, daughter of Loki, ruler over the location of the same name
- Simek (2007:138).
- Faulkes (1995:157).
- Simek (2007:138—139).