Snakes in Norse mythology appear as world-sized monsters, creatures beneath Yggdrasil, instruments of punishment, and recurring forms in Viking Age art. The most famous is Jörmungandr, the Midgard Serpent that encircles the human world and is destined to kill and be killed by Thor at Ragnarök.
But Jörmungandr is not the only Norse serpent. Nidhogg gnaws beneath Yggdrasil, several other named snakes live around the World Tree, and a venomous serpent torments Loki after he is bound by the gods.
What snakes symbolized is more complicated. The surviving Norse sources connect serpents strongly with danger, destruction, cosmic boundaries, punishment and fate. Modern claims that Viking snakes universally represented eternity, rebirth or protection go beyond what the surviving texts actually tell us.
For the wider role of serpents across cultures, see the main guide to snakes in mythology.
Table of Contents
Snakes in Norse mythology at a glance
| Serpent | Role in Norse mythology |
|---|---|
| Jörmungandr | The Midgard or World Serpent, child of Loki, enemy of Thor and major figure at Ragnarök |
| Nidhogg | Serpent or dragon-like creature that gnaws beneath Yggdrasil |
| Goin and Moin | Two serpents named beneath Yggdrasil in Grímnismál |
| Grabak and Grafvolluth | Additional serpents listed around the World Tree |
| Ofnir and Svafnir | Two more serpent names given in Grímnismál |
| The serpent above Loki | A venomous snake whose poison drips toward the bound Loki while Sigyn tries to catch it |
What did snakes represent in Norse mythology?
There is no surviving Norse text that gives snakes one universal symbolic meaning. It is more accurate to look at the roles individual serpents play in the stories.
- Danger: Jörmungandr’s venom kills Thor, while another venomous serpent is used to torment Loki.
- Destruction: Jörmungandr emerges during Ragnarök, while Nidhogg continually damages Yggdrasil.
- Cosmic boundaries: Jörmungandr physically encircles Midgard, the human world.
- Fate: Thor and Jörmungandr are destined for a final confrontation that neither survives.
- Punishment: a serpent dripping venom forms part of Loki’s punishment.
- Decay: Nidhogg’s gnawing contributes to the suffering of the World Tree.
These ideas differ considerably from serpent traditions elsewhere. For comparison, snakes in Egyptian mythology can represent both royal protection and chaos, while snakes in Hindu mythology include divine nāgas associated with water, fertility and cosmic order.
Jörmungandr: the giant snake in Norse mythology
Jörmungandr is the giant snake most people mean when they refer to the serpent in Norse mythology. He is commonly called the Midgard Serpent or World Serpent.
In the Prose Edda, Jörmungandr is one of three extraordinary children born to Loki and the giantess Angrboða. The others are Fenrir, the enormous wolf, and Hel, ruler of a realm of the dead.
The gods fear what Loki’s children will become. Odin has Jörmungandr thrown into the ocean surrounding Midgard, but this does not destroy him. Instead, the serpent grows until he becomes so enormous that his body encircles the earth and he holds his own tail in his mouth.
An early English translation of the Prose Edda can be read through Project Gutenberg.
Is Jörmungandr the snake eating its own tail?
Yes. In the Prose Edda, Jörmungandr grows large enough to surround the world while holding his tail in his mouth.
That image naturally invites comparison with the ouroboros, the famous image of a serpent forming a circle by biting or swallowing its own tail.
But the similarity should not be pushed too far. The Norse sources do not explicitly say that Jörmungandr represents eternity, rebirth or an endless cycle. Those meanings are commonly associated with ouroboros traditions elsewhere, but Jörmungandr’s clearest role in the Norse myths is as a world-encircling threat and the destined enemy of Thor.
This distinction matters when comparing Norse imagery with other traditions such as Greek snake mythology or the broader symbolism covered in animals in mythology.
Thor and the Midgard Serpent
Thor and Jörmungandr are enemies long before Ragnarök.
One of their best-known encounters occurs when Thor goes fishing with the giant Hymir. Thor uses the head of an ox as bait and rows far enough out to sea to reach the waters where the Midgard Serpent lies.
Jörmungandr takes the bait. Thor pulls the enormous serpent toward the boat, creating one of the most dramatic scenes in Norse mythology.
The surviving versions differ in details. In Snorri Sturluson’s account, Hymir cuts the fishing line and Jörmungandr sinks back into the sea. The episode establishes the hostility between the thunder god and the serpent that eventually ends at Ragnarök.
Jörmungandr and Thor at Ragnarök
The rivalry finally reaches its conclusion during Ragnarök, the catastrophic series of events surrounding the destruction and renewal of the Norse cosmos.
Jörmungandr emerges from the sea and joins the forces involved in the conflict. Thor confronts and kills the serpent.
The victory costs Thor his life. After killing Jörmungandr, he manages only nine steps before collapsing from the serpent’s venom.
This makes Jörmungandr one of the few beings powerful enough to bring down Thor, even though the serpent also dies in their encounter.
What does Jörmungandr symbolize?
The Eddas never provide a simple statement saying that Jörmungandr represents one specific idea.
Based on his actual role in the stories, several interpretations are better supported than others:
- The boundary of the human world: Jörmungandr literally surrounds Midgard.
- Cosmic danger: the gods fear him before he reaches adulthood.
- Uncontrollable forces: casting him into the ocean does not eliminate the threat.
- Fate: his story is inseparable from the death of Thor at Ragnarök.
- Destruction of the existing order: his emergence accompanies the collapse of the old Norse cosmos.
Modern interpretations involving infinity, eternity and renewal may be inspired by his tail-biting form, but they should be described as interpretations rather than explicit meanings given in the Norse sources.
Nidhogg: the serpent beneath Yggdrasil
Nidhogg, or Níðhöggr, is the other major serpent-like creature in Norse mythology. Rather than surrounding Midgard, Nidhogg is associated with Yggdrasil, the enormous World Tree at the center of Norse cosmology.
In Grímnismál, Yggdrasil is described as suffering damage from several directions. Deer browse above, the tree itself deteriorates, and Nidhogg gnaws below.
Nidhogg also appears in Snorri’s Prose Edda, where the creature is associated with the roots of Yggdrasil.
Another famous story involves the squirrel Ratatoskr, which travels up and down the tree carrying hostile messages between Nidhogg below and the eagle positioned above.
Nidhogg appears again near the end of Völuspá, where the creature flies carrying bodies associated with the dead. That makes Nidhogg more complicated than simply “the snake eating Yggdrasil.”
What snakes live beneath Yggdrasil?
Nidhogg is not the only serpent connected with the World Tree.
Stanza 34 of Grímnismál lists several serpents beneath Yggdrasil:
- Goin
- Moin
- Grabak
- Grafvolluth
- Ofnir
- Svafnir
The poem gives their names but very little individual mythology. Modern retellings sometimes give these snakes detailed personalities, roles or symbolic meanings that do not appear in the surviving source.
An English translation of Grímnismál can be read in the Poetic Edda translation at the Internet Sacred Text Archive.
Loki and snakes in Norse mythology
Loki has important connections with snakes, but he is not the Norse god of snakes.
The most obvious connection is Jörmungandr. Loki is the World Serpent’s father, making one of the most destructive creatures in Norse mythology part of his family.
The second connection comes through Loki’s punishment after the events surrounding the death of Baldr.
The gods bind Loki and place a venomous serpent above him. His wife Sigyn remains beside him holding a vessel beneath the snake to catch its dripping venom.
Whenever Sigyn has to empty the vessel, venom reaches Loki. He struggles so violently from the pain that the movement is used to explain earthquakes.
The serpent in this episode is not identified as Jörmungandr.
Was Loki’s symbol a snake?
There is no clear surviving evidence that the snake functioned as a universal historical symbol or emblem of Loki.
Snakes are associated with Loki through two major stories: he fathers Jörmungandr, and a serpent is used in his punishment. That makes serpent imagery understandable in modern representations of Loki, but it is different from saying that historical Norse people had an established “Loki snake symbol.”
This distinction is useful when looking at mythology more generally. Later art and popular culture can give an animal a symbolic relationship with a god that is much more standardized than it was in the surviving ancient or medieval material.
Was there a Norse god of snakes?
No major Norse deity is identified in the surviving sources as a dedicated god of snakes.
Jörmungandr is sometimes called a snake god online because of his enormous scale and supernatural importance, but he is not one of the Æsir or Vanir gods. He is a monstrous child of Loki.
Loki also has major serpent connections, but the surviving myths do not identify him as the god of snakes.
This differs from some other mythological systems where serpent imagery is attached more directly to particular deities. Compare the guides to Greek gods associated with snakes and Egyptian snake gods and goddesses.
Viking snake meaning
Snake-like and serpentine animals appear frequently in Viking Age art, but there is no single documented Viking snake symbol with one universal meaning.
Viking Age artists frequently worked with elongated animal bodies, interlacing creatures and ribbon-like forms. Some look unmistakably serpentine, while others combine characteristics of different animals.
The late Viking Age Urnes style is a good example. Its motifs include thin ribbon-like forms and snake-like creatures intertwined with larger animals. Similar ornament appears on carved wood, runestones and metal objects.
That does not mean every Viking snake carving depicts Jörmungandr. Nor does every serpent automatically mean protection, eternity, rebirth or strength.
The meaning of an image depends on its archaeological and artistic context, and sometimes the original meaning simply cannot be recovered.
For a useful overview of how animal ornament changed through the period, see Smarthistory’s guide to Viking Age art. Its discussion of the Urnes style identifies snake-like creatures as one of its characteristic motifs. :contentReference[oaicite:3]{index=3}
Did Viking snake symbols mean protection?
Claims that a Viking snake universally symbolized protection should be treated cautiously.
Protective serpent symbolism certainly exists in other cultures. The cobra in Egyptian mythology, for example, could be associated with royal and divine protection.
But Norse serpent stories often emphasize threats instead. Jörmungandr kills Thor, Nidhogg damages Yggdrasil, and a venomous serpent torments Loki.
A particular Viking Age serpent image might have carried a protective meaning, but the surviving evidence does not justify treating that as the standard meaning of all Norse snake imagery.
What is the Old Norse word for snake?
The Old Norse word ormr could refer to a snake or serpent and was also used more broadly for worm-like or dragon-like creatures.
The word survives in Miðgarðsormr, one of the Old Norse names for the Midgard Serpent.
This broader sense of “serpent” or “worm” is important when reading translated Norse mythology because the modern distinction between a snake and a dragon does not always map neatly onto medieval terminology.
Are Norse serpents dragons or snakes?
The distinction is not always clean.
Jörmungandr is consistently understood as an enormous serpent. Nidhogg is often translated or described as either a serpent or a dragon, depending on the source and translation.
Old Norse vocabulary and medieval imagery did not necessarily separate categories such as snake, serpent, worm and dragon in the same way modern fantasy does.
That is one reason it is better to pay attention to what each creature actually does in the surviving stories rather than trying to force every Norse monster into a modern biological category.
How Norse snake symbolism compares with other cultures
Serpents appear in mythologies around the world, but the meanings are surprisingly different.
- Greek snake mythology includes monsters, guardians and the serpent associated with Asclepius and healing.
- Egyptian snake mythology includes both the protective cobra and the chaos serpent Apep.
- Hindu snake mythology includes nāgas and cosmic serpents such as Shesha.
- Chinese snake mythology includes serpent beings, transformation stories and snake spirits.
- Japanese snake mythology includes gods, supernatural snakes and Yamata no Orochi.
- Snakes in Vodou include the important serpent-associated lwa Damballa.
Those differences are why it is risky to take a broad idea such as “snakes mean rebirth” and apply it automatically to Norse mythology.
Why Jörmungandr is the most famous Norse serpent
Jörmungandr combines several of the largest ideas in Norse mythology in a single creature.
He is a child of Loki, physically surrounds the human world, repeatedly clashes with Thor and finally helps bring the old cosmic order to an end at Ragnarök.
Nidhogg and the snakes beneath Yggdrasil show that serpents were not confined to one isolated story. They appear at the edges, roots and points of instability within the Norse cosmos.
The surviving material therefore gives us something more interesting than a single “Viking snake meaning.” Different serpents play different roles: Jörmungandr defines and threatens the human world, Nidhogg gnaws beneath the World Tree, and the serpent above Loki becomes an instrument of punishment.
For the broader cross-cultural picture, continue with snakes in mythology.