Voss (pronunciation^ⓘ) is a municipality and a traditional district in Vestland county, Norway. The administrative center of the municipality is the village of Vossevangen. Other villages include Bolstadøyri, Borstrondi, Evanger, Kvitheim, Mjølfjell, Oppheim, Stalheim, and Vinje.

The 2,042-square-kilometre (788 sq mi) municipality is the 35th largest by area of Norway's 356 municipalities. Voss is Norway's 76th most populous municipality, with a population of 16,144. Its population density is 8.2 inhabitants per square kilometre (21/sq mi) and its population has increased by 7.9% over the last 10 years.

The parish of Voss was established as a municipality on 1 January 1838 (see formannskapsdistrikt law). On 1 January 1867, a small area in northern Voss (population 28) was transferred to the municipality of Hosanger. On 1 January 1868, the municipality's northern district (population 2,009) was separated to form the new municipality of Vossestrand. This left 7,592 residents in Voss. On 21 August 1868, an unpopulated area of northern Voss was transferred to Vossestrand. On 1 January 1885, the western district of Voss (population 2,045) was separated to form the new municipality of Evanger. This left Voss with 5,403 residents.

During the 1960s, there were many municipal mergers across Norway due to the work of the Schei Committee. On 1 January 1964, the municipality of Voss (population 10,575), the municipality of Vossestrand (population 1,573), and most of the municipality of Evanger (population 1,075) were all merged into a new, larger municipality of Voss. (The rest of Evanger was merged into the new municipality of Vaksdal.)

On 1 January 2020, the neighboring municipality of Granvin merged with Voss, creating a larger Voss municipality. Before the merger, it was known as Voss kommune, but afterward it was called Voss herad, using the title herad which Granvin formerly had used.

The municipality (originally the parish) is named after the traditional district of Voss (Old Norse: Vǫrs). The name is likely derived from the word vǫrr which means "water" (likely the old district name was originally used as the name for the lake Vangsvatnet.

The original coat of arms was granted on 8 July 1977 and was in use until 1 January 2020, when the municipality was enlarged. The official blazon is "Gules, a deer stag argent" (Norwegian: På raud grunn ein opprett kvit hjort). This means the arms have a red field (background) and the charge is a deer stag with antlers. The charge has a tincture of argent which means it is commonly colored white, but if it is made out of metal, then silver is used. The arms are based on the seal of Peter, who was the owner of the farm Finne in Voss, one of the largest farms in Western Norway during the Middle Ages. He used a silver deer on a red background as his personal coat of arms in 1303. His son also used a deer on his seals, as did most of their relatives until 1460. The shape and position of the deer varied, but it always was the main figure. The arms were designed by Hallvard Trætteberg. The municipal flag was nearly the same design as the coat of arms, the main difference was the placement of the deer legs.

A new coat of arms was granted in 2019 for use starting on 1 January 2020 after the merger of Voss and Granvin. The decision was made to blend the old municipalities' previous arms, so the design from Granvin and the colors from Voss were chosen for the new arms. The official blazon is "Gules, a fiddle argent in bend sinister" (Norwegian: På raud grunn ei sølv fele, skråstilt venstre-høgre). This means the arms have a red field (background) and the charge is a hardanger fiddle (Norwegian: Hardingfele), a Norwegian folk instrument. The fiddle has a tincture of argent. The area has an active folk-music tradition. The arms were designed by Øyvind Kvamme. The municipal flag has the same design as the coat of arms.