Hillesøy Municipality

Hillesøy is a former municipality in Troms county in Norway. The 461-kilometre (286 mi) municipality existed from 1855 until its dissolution in 1964. It was located on both sides of the Malangen fjord in what is now Tromsø Municipality and Senja Municipality. The administrative centre was located at Brensholmen on the western shore of the island of Kvaløya. Brensholmen is also the location of Hillesøy Church, the main church for the municipality.

Prior to its dissolution in 1964, the 461.2-square-kilometre (178.1 sq mi) municipality was the 214th largest by area out of the 689 municipalities in Norway. Hillesøy Municipality was the 365th most populous municipality in Norway with a population of about 2,507. The municipality's population density was 5.4 inhabitants per square kilometre (14/sq mi) and its population had decreased by 2.6% over the previous 10-year period. Hillesøy Municipality included about 458 square kilometres (177 sq mi) of land with 164 square kilometres (63 sq mi) on the island of Senja, about 263 square kilometres (102 sq mi) on the island of Kvaløya, and about 31 square kilometres (12 sq mi) of smaller islands including Hillesøya and Sommarøya. On Senja island, Hillesøy Municipality included the larger villages of Fjordgård, Husøy, and Botnhamn. On Kvaløya island, it included Ersfjordbotn and Brensholmen. The island of Sommarøya is connected to the large island of Kvaløya by the Sommarøy Bridge. Most of the other islands are only accessible by boat.