Harstad is a municipality and city located in Troms county, Norway, situated primarily on the large island of Hinnøya. It serves as the administrative center for the region and holds the distinction of being the second-most populated municipality in Troms. The municipal area encompasses numerous islands within southern Troms county, including Grytøya, Bjarkøya, and Sandsøya, while sharing water borders with Ibestad Municipality to the northeast.