Thor (Old Norse: Þórr) is the god of thunder in the Norse pantheon and one of the most widely attested and popularly venerated deities in the pre-Christian Germanic world. Son of Odin and the earth-personification Jörð, Thor is described across the primary sources as a physically powerful, red-bearded deity who rides a chariot drawn by two goats — Tanngrisnir (Teeth-Barer) and Tanngnjóstr (Teeth-Grinder) — whose rumbling across the sky produces thunder. He dwells in his hall Bilskirnir within the realm of Þrúðvangr, which the Prose Edda’s Gylfaginning describes as the greatest of all halls. Thor is the principal protector of Ásgarðr, Miðgarðr, and mankind against the forces of chaos, and his primary antagonists are the jötnar (giants).

Thor’s defining implement is his hammer Mjölnir, described in the Prose Edda’s Skáldskaparmál as the greatest of all treasures and forged by the dwarves Sindri and Brokkr. Thor wields it in conjunction with a belt of strength (Megingjörð) and a pair of iron gloves (Járngreipr) without which the hammer cannot be handled. The Eddic poem Þrymskviða narrates the theft of Mjölnir by the giant Þrymr and its recovery by Thor, who disguises himself as the goddess Freyja in order to retrieve it. Mjölnir-pendant amulets constitute some of the most archaeologically abundant Norse religious artifacts recovered from the Viking Age, indicating widespread popular veneration across Scandinavia and beyond.

Thor’s cosmological role culminates at Ragnarök, described in Völuspá and Gylfaginning. Thor and the Midgard Serpent Jörmungandr slay each other: Thor kills the serpent but succumbs to its venom after walking nine steps. Thor’s cult was among the most geographically extensive in the pre-Christian North. Adam of Bremen’s Gesta Hammaburgensis identifies Thor as one of three principal deities at Uppsala, enthroned at the center and governing the air, thunder, lightning, wind, rain, and good harvests. Place-name evidence across Norway, Sweden, Denmark, and Iceland — including Torshov, Þórsmörk, and numerous Tor- compounds — independently attests to the breadth of his cult. Thursday (Þórsdagr) is named for him across the Germanic languages.