In Norse mythology, svartálfar (Old Norse "swarthy elves" or "black elves", singular svartálfr) are beings who dwell in Svartálfaheimr (anglicized as Svartalfheim, "world of black-elves"). Both the svartálfar and Svartálfaheimr are solely attested in the Prose Edda, written in the 13th century by Snorri Sturluson. Scholars have noted that the svartálfar appear to be synonymous with dwarfs and potentially also the dökkálfar (Old Norse "dark elves").
The svartálfar are solely attested in the Prose Edda. The svartálfar mentioned in Skáldskaparmál 35 are the Sons of Ivaldi, whom Loki engages to craft replacement hair for Sif, wife of the god Thor, after Loki mischievously sheared off her golden tresses. Ivaldi is often glossed as being a dwarf.
Svartálfaheimr ("world of black-elves") appears in the Prose Edda twice, in each case as the place where certain dwarfs can be found to be living: In Gylfaginning 33, the "world of black-elves" is where the dwarfs are sought by the gods to craft the fetter Gleipnir to bind the wolf Fenrir. And in Skáldskaparmál, 39, the "world of black-elves" is where Loki encounters the dwarf Andvari.
Scholars have commented that, as both attestations mentioning the beings and location appear to refer to dwarves, svartálfr and dwarf may simply be synonyms for the same concept. Scholar John Lindow comments that whether the dökkálfar and the svartálfr were considered the same at the time of the writing of the Prose Edda is also unclear.