Jølster is a municipality in the county of Sogn og Fjordane, Norway. It is located in the traditional district of Sunnfjord. The administrative centre is the village of Skei. Other population centers in the municipality include Vassenden and Langhaugane.

Jølster lies at the centre of Sogn og Fjordane county and is known for its rich cultural traditions in home crafts, folk music, song, dancing and creative arts. Agriculture is the largest and most important industry. The principal attractions being the beautiful scenery, easy access to the glaciers. Jølster is home to part of the largest glacier of continental Europe, the Jostedalsbreen as well as a clear green lake named Jølstravatn. The trout caught in Jølstravatn are renowned throughout Norway and beyond.

Jølster was established as a municipality on 1 January 1838 (see formannskapsdistrikt). The original municipality was identical to the Jølster parish (prestegjeld) with the sub-parishes (sokn) of Ålhus and Helgheim. On 1 January 1964, the farm area of Førde in Breim (population: 38) was transferred to Jølster.