Vanna or Vannøya is a rocky island in the municipality of Karlsøy in Troms county, Norway. At 232 square kilometres (90 sq mi), Vanna is the 17th largest island in Norway by area. The highest peak is the mountain Vanntinden at a height of 1,031 metres (3,383 ft) above sea level. The population of the island (2001) is 973. Vannvåg and Vannareid are the two main population centres on the island.