Vefsn Municipality
| Vefsn Municipality Vefsn kommune | |
|---|---|
| Vefsen herred (historic name) | |
| Nordland within Norway | |
| Vefsn within Nordland | |
| Coordinates: 65°47′57″N 13°15′02″E / 65.79917°N 13.25056°E | |
| Country | Norway | 
| County | Nordland | 
| District | Helgeland | 
| Established | 1 Jan 1838 | 
| • Created as | Formannskapsdistrikt | 
| Administrative centre | Mosjøen | 
| Government | |
| • Mayor (2023) | Rune Krutå (Ap) | 
| Area | |
|  • Total | 1,929.40 km2 (744.95 sq mi) | 
| • Land | 1,838.13 km2 (709.71 sq mi) | 
| • Water | 91.27 km2 (35.24 sq mi) 4.7% | 
| • Rank | #41 in Norway | 
| Highest elevation | 1,556.55 m (5,106.79 ft) | 
| Population  (2024) | |
|  • Total | 13,469 | 
| • Rank | #91 in Norway | 
| • Density | 7/km2 (20/sq mi) | 
| • Change (10 years) | +1.4% | 
| Demonym | Vefsning | 
| Official language | |
| • Norwegian form | Neutral | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| ISO 3166 code | NO-1824 | 
| Website | Official website | 
Vefsn (Southern Sami: Vaapste) is a municipality in Nordland county, Norway. It is part of the Helgeland traditional region. The administrative centre of the municipality is the town of Mosjøen (population: 9,843). Some of the notable villages in Vefsn include Drevvassbygda, Elsfjord, and Husvik.
The 1,929-square-kilometre (745 sq mi) municipality is the 41st largest by area out of the 357 municipalities in Norway. Vefsn is the 91st most populous municipality in Norway with a population of 13,469. The municipality's population density is 7 inhabitants per square kilometre (18/sq mi) and its population has increased by 1.4% over the previous 10-year period.