Sogn is a traditional district in Western Norway (Norwegian: Vestlandet). It is located in the county of Vestland, surrounding the Sognefjord, the largest/longest fjord in Norway. The district of Sogn consists of the municipalities of Aurland, Hyllestad, Høyanger, Gulen, Luster, Lærdal, Sogndal, Solund, Vik, and Årdal.
The district covers 10,675 square kilometres (4,122 sq mi). The largest urban area in Sogn is the village of Sogndalsfjøra (in Sogndal Municipality), with 4,475 residents. The second largest urban area is the village Øvre Årdal (in Årdal Municipality), with 3,094 people (this village used to be the largest, but recently it was passed by Sogndalsfjøra).