Pfäfers is a municipality in the Wahlkreis (constituency) of Sarganserland in the canton of St. Gallen in Switzerland. The villages Pfäfers, St. Margrethenberg, Vadura, Valens, Vasön and Vättis belong to the municipality.
The Taminatal can look back on a long history of settlement. In the Drachenloch above Vättis stonetools of cavemen and bones of bears, perhaps 50,000 years old, were found. Examples from the find are on display in the local museum in Vättis.
Pfäfers reached importance through the foundation of the Benedictine monastery, Pfäfers Abbey, in the first half of the 8th century. It existed for over a thousand years and was closed in 1838. Since 1847 the abbey premises have been used as a mental institution.
Pfäfers is first mentioned in 762 as abbas de Fabarias. In 1247 it was mentioned as Pheuers and in 1288 as Pfaevaers. In Romansh it is known as Faveras.
In the 14th century Walser settled in the Calfeisental. Until today the colony of St. Martin and the Walserhouse on the alp Ebni can be visited.