Os, 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 (2015-2019)Marie Lunde Bruarøy (H)
Area
 (upon dissolution)
  Total
139.57 km2 (53.89 sq mi)
  Land133.48 km2 (51.54 sq mi)
  Water6.09 km2 (2.35 sq mi)  4.4%
  Rank#360 in Norway
Population
 (2019)
  Total
20,152
  Rank#57 in Norway
  Density151.0/km2 (391/sq mi)
  Change (10 years)
 +29.2%
DemonymOsing
Official language
  Norwegian formNynorsk
Time zoneUTC+01:00 (CET)
  Summer (DST)UTC+02:00 (CEST)
ISO 3166 codeNO-1243

Os is a former municipality in the old Hordaland county, Norway. It was located in the Midhordland region, just south of Norway's second-largest city, Bergen. Due to its proximity to Bergen, Os experienced strong general population growth. The administrative centre (and commercial centre) of Os was the village of Osøyro. It is the largest settlement in the municipality, with over 60% of the municipal residents living here. Other large villages in Os included Hagavik, Halhjem, Søfteland, Søre Øyane, and Søvik. On 1 January 2020, the municipality became part of Bjørnafjorden Municipality in Vestland county.

Prior to its dissolution in 2020, the 140-square-kilometre (54 sq mi) municipality is the 360th largest by area out of the 422 municipalities in Norway. Os is the 57th most populous municipality in Norway with a population of 20,152. The municipality's population density is 151 inhabitants per square kilometre (390/sq mi) and its population has increased by 29.2% over the last decade.