Lærdal is a municipality in the southeastern part of Sogn og Fjordane county, Norway. It is located on the south side of the Sognefjorden in the traditional district of Sogn. The administrative center of the municipality is the village of Lærdalsøyri. The area of the municipality is , half of it consists of mountain areas, the rest is valleys. The old Filefjell Kongevegen road passes through Lærdal on its way to Valdres and later to Oslo.