Slidrefjord or Slidrefjorden is a lake that lies in Vestre Slidre Municipality (and the far northwestern end of the lake lies in Vang Municipality) in Innlandet county, Norway. The lake is not an actual fjord, just a lake that is part of the Begna river watershed. Slidrefjord has a surface area of 11.4 km2 and a shore length of 46.34 km. The lake sits at an elevation of 366 m above sea level. The European route E16 highway runs along the northern shore of the lake.