Vikings is a historical drama television series created and written by Michael Hirst. A co-production between Canada and Ireland, the series originally aired on the History Channel, premiering on 3 March 2013 and concluding on 30 December 2020, when the second half of the sixth season was released in its entirety on Amazon Prime Video in the Republic of Ireland, ahead of its broadcast on History in Canada from January 1 to March 3, 2021. A sequel series, titled Vikings: Valhalla, premiered on Netflix on February 25, 2022.

It is inspired by the sagas of Ragnar Lodbrok, a Viking who is one of the best-known legendary Norse heroes and notorious as the scourge of Anglo-Saxon England and West Francia. The show portrays Ragnar as a farmer from the Kattegat who rises to fame by raiding England and eventually becomes a Scandinavian king, with the support of his family and fellow warriors. In the later seasons, the series follows the fortunes of his sons and their adventures in England, Scandinavia, Kievan Rus', the Mediterranean and North America.

The series's principal cast features Travis Fimmel as Lothbrok, alongside Katheryn Winnick, Clive Standen, Jessalyn Gilsig, Gustaf Skarsgård, Gabriel Byrne, George Blagden, Donal Logue, Alyssa Sutherland, Linus Roache, and Alexander Ludwig. The series was filmed entirely in the Republic of Ireland, on-location in County Wicklow and at Ashford Studios.