Borgund is a former municipality in Sogn og Fjordane county, Norway. It was located in the southeastern part of the traditional district of Sogn. The 635-square-kilometre (245 sq mi) municipality existed from 1864 until its dissolution in 1964. It encompassed an area in the eastern part of the present-day Lærdal Municipality. The administrative center of Borgund was the village of Steinklepp, just northeast of the village of Borgund. Steinklepp was the site of a store, a bank, and a school. The historical Filefjell Kongevegen road passes through the Borgund area.

Sogn og Fjordane was, up to 1 January 2020, a county in western Norway, when it was merged to become part of Vestland county. Bordering previous counties Møre og Romsdal, Oppland, Buskerud, and Hordaland, the county administration was in the village of Hermansverk in Leikanger municipality. The largest town in the county was Førde.