Mostad or Måstad is an abandoned village on the southern part of the island of Værøya at the southern end of the Lofoten archipelago and is located on a strandflat. It is located in Værøy Municipality in Nordland county, Norway.

Mostad was in its prime around the year 1900 when over 120 people lived here. However, because there are no roads connecting to it and that it has a very unsatisfactory harbour, the village was abandoned a few years after World War II. The last citizens left Mostad in the 1950s. Today, the place is an El Dorado for those who seek wilderness and beauty. From 1950 to 1960, there were several houses from Mostad that were moved to the village of Sørland on the other side of the island where living was much easier. Today only a few houses are left still standing.

Catching puffins was a subsidiary source of income beside fishing. Catching puffins involved the use of the unusual puffin dog, also termed the Mostad dog or the Norwegian Lundehund. Puffin meat was cured in salt and lasted way into the autumn. Today, there are about 600 puffin dogs in Norway. All of them can be traced back to Mostad. Going ashore on Mostad is generally combined with a fishing trip or an expedition by boat to the bird cliffs. Mostad can also be reached by foot. Since 1996, simple overnight accommodation has been available at the schoolhouse in Mostad.