Os Municipality (Hordaland)

Os Municipality
Os kommune
View of Osøyro
Hordaland within Norway
Os within Hordaland
Coordinates: 60°13′37″N 05°28′33″E / 60.22694°N 5.47583°E / 60.22694; 5.47583
CountryNorway
CountyHordaland
DistrictMidhordland
Established1 Jan 1838
 • Created asFormannskapsdistrikt
Disestablished1 Jan 2020
 • Succeeded byBjørnafjorden Municipality
Administrative centreOsøyro
Government
 • Mayor (2018–2019)Terje Søviknes (FrP)
Area
 (upon dissolution)
 • Total
139.58 km2 (53.89 sq mi)
 • Land133.51 km2 (51.55 sq mi)
 • Water6.07 km2 (2.34 sq mi)  4.3%
 • Rank#360 in Norway
Highest elevation
842.6 m (2,764 ft)
Population
 (2019)
 • Total
20,804
 • Rank#56 in Norway
 • Density149/km2 (390/sq mi)
 • Change (10 years)
 +26.6%
DemonymOsing
Official language
 • Norwegian formNynorsk
Time zoneUTC+01:00 (CET)
 • Summer (DST)UTC+02:00 (CEST)
ISO 3166 codeNO-1243

Os (Nynorsk: [uːs]) is a former municipality in the old Hordaland county, Norway. The 139.58-square-kilometre (53.89 sq mi) municipality existed from 1838 until its dissolution in 2020. The area is now part of Bjørnafjorden Municipality in the traditional district of Midhordland in Vestland county, just south of Norway's second-largest city, Bergen. The administrative centre was the village of Osøyro. Other villages in the municipality included Hagavik, Haljem, Syfteland, Søre Øyane, and Søvik.

Prior to its dissolution in 2020, the 139.58-square-kilometre (53.89 sq mi) municipality was the 360th largest by area out of the 422 municipalities in Norway. Os Municipality was the 149th most populous municipality in Norway with a population of about 20,804. The municipality's population density was 149 inhabitants per square kilometre (390/sq mi) and its population had increased by 26.6% over the previous 10-year period.