Hällas () are a Swedish progressive rock band formed in 2011 in Jönköping, Småland, by Jesper Nodbrant, Tommy Alexandersson and Kasper Eriksson. Currently based in Linköping, Östergötland, they play a blend of progressive rock, hard rock and heavy metal inspired by 1970s bands, resulting in a genre that they call "adventure rock".

The band is named after the main character of the stories they tell in their lyrics; Hällas is a knight living in parallel, medieval universe in which "religion similarly, albeit not necessarily the ones we recognize from here, are very prevalent and where treacherous tyrants reign lands on the verge of the apocalypse and where seers have gained so much strength that they can dictate the future and the past".