(Hárstták) is the second-most populated municipality in Troms og Finnmark county, Norway. It is mostly located on the large island of Hinnøya. The municipal center is the town of Harstad, which is the most populous town in Central Hålogaland and the third-largest in all of Northern Norway. The town was incorporated in 1904. Villages in the municipality include Elgsnes, Fauskevåg, Gausvik, Grøtavær, Kasfjord, Lundenes, Nergården and Sørvika. The municipality is the 226th largest by area out of Norway's 356 municipalities and 49th most populous with a population of 24,903. Its population density is and the population has increased by 2.5% over the 10 years up to 2023. The municipality is located on many islands in southern Troms og Finnmark county. Most of the municipality is located on the large island of Hinnøya, which is Norway's largest coastal island (three islands in the Svalbard archipelago are larger). The northern part of the municipality is located on the smaller islands of Grytøya, Bjarkøya, Sandsøya, Helløya, Flatøya and Krøttøya and many even smaller islands between the Andfjorden (to the west) and the Vågsfjorden (to the east). The municipality contains several small islands, including Arnøya, Gressholman, Helløya, Kjeøya, Kjøtta, Kjøttakalven, Flatøya, Meløyvær, Måga, Rogla, Lille Rogla and Åkerøya. Harstad is bordered by the municipality Kvæfjord to the west and Tjeldsund (in Nordland county) to the south. To the southeast, the Tjeldsund Bridge connects Hinnøya with Skånland municipality and the mainland across Tjeldsundet, and to the northeast is the Vågsfjorden, where Harstad shares a water border with Ibestad municipality. The city itself is located on the northeastern part of on Hinnøya; it is the only city on the island, and is popularly known as Vågsfjordens perle (The pearl of Vågsfjorden). The highest mountain in Harstad is Sætertinden, which is above sea level. It is located near the village of Sandtorg in southern Harstad. The tall mountain, Nupen, is located in the northwestern part of the municipality on the border with Kvæfjord.