Osterøy Municipality

Osterøy Municipality
Osterøy kommune
View of the village of Haus
Vestland within Norway
Osterøy within Vestland
Coordinates: 60°31′05″N 05°32′29″E / 60.51806°N 5.54139°E / 60.51806; 5.54139
CountryNorway
CountyVestland
DistrictNordhordland
Established1 Jan 1964
 • Preceded byHamre, Hosanger, Haus, and part of Bruvik
Administrative centreLonevåg
Government
 • Mayor (2019)Lars Fjeldstad (Sp)
Area
 • Total
255.11 km2 (98.50 sq mi)
 • Land243.70 km2 (94.09 sq mi)
 • Water11.41 km2 (4.41 sq mi)  4.5%
 • Rank#285 in Norway
Highest elevation
868.14 m (2,848.2 ft)
Population
 (2025)
 • Total
8,172
 • Rank#131 in Norway
 • Density32/km2 (83/sq mi)
 • Change (10 years)
 +5.3%
DemonymOstring
Official language
 • Norwegian formNynorsk
Time zoneUTC+01:00 (CET)
 • Summer (DST)UTC+02:00 (CEST)
ISO 3166 codeNO-4630
WebsiteOfficial website

Osterøy is an island municipality in Vestland county, Norway. It is located in the traditional district of Nordhordland. The municipality encompasses most of the island of Osterøy. The administrative centre of Osterøy is the village of Lonevåg in the central part of the island. The largest settlement is the village of Valestrandfossen with 1,380 inhabitants as of 1 January 2025.

Osterøy municipality and Vaksdal Municipality are both located on the island of Osterøy. Osterøy municipality covers most of the island with the mostly uninhabited northeastern part of the island belonging to Vaksdal Municipality. Osterøy is located a short distance northeast of the city of Bergen. It is surrounded by the Osterfjorden, Sørfjorden, and Veafjorden. The 19th-century musician and composer Ole Bull had a summer home in Valestrandfossen in Osterøy. The historic Havrå farm is a cluster farm which represents the traditional way of living for farmers. Havrå is located on the southeastern part of the municipality.

The 255.11-square-kilometre (98.50 sq mi) municipality is the 285th largest by area out of the 357 municipalities in Norway. Osterøy Municipality is the 131st most populous municipality in Norway with a population of 8,172. The municipality's population density is 32 inhabitants per square kilometre (83/sq mi) and its population has increased by 5.3% over the previous 10-year period.