Viken (Norwegian for "the bay") is an historical district surrounding the Oslofjord in southeastern Norway. The cultural hub is centred in Oslo and the capital of the region was formerly at Borre. It comprises the historical provinces of Vestfold, Østfold, Ranrike, Vingulmark and Båhuslen. During the European Migration Period, this was a heavily fortified area.

It has been hypothesized that the word Viking is derived from this name, with the meaning "person/people from the Bay area".

Modern usage

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In modern usage, the term Viken has been revitalized as a description for the district around the Oslo Fjord, especially the inner bay around Oslo, including Asker, Bærum, and Oslo. Vingulmark would historically have been a more precise name.

See also

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• Vingulmark

Districts of Norway | Geography of Oslo | Viking Age | Petty kingdoms of Norway

Viken | Viken | Vika