Nólsoy is an island in central Faroe Islands, located to the east of the capital Tórshavn in Streymoy. There is only one settlment on the island: Nólsoy on the north-west coast on Stongin, a peninsula attached to the rest of the island by a metres-wide isthmus. There is also one mountain Høgoyggj, the highest point is called Eggjarklettur (371 m) and Nólsoy is the lowest of the faroese isles. Nólsoy has the world's largest colony of storm petrel. The southern coast contains two capes, each with a lighthouse (Øknastangi on the south-east, Borðan on the south). The lighthouses were built in the late 18th century to aid smugglers working against the trading monopoly.

Nólsoy was the home of Nólsoyar-Páll or Poul Nolsøe, a Faroese national hero for his poetry, efforts to stop the trading monopoly and for starting modern faroese seamanship.