Quarten is a municipality in the Wahlkreis (constituency) of Sarganserland, in the canton of St. Gallen, Switzerland, above Lake Walensee.

Besides Quarten itself, the municipality includes the settlements of Oberterzen, Unterterzen, Quinten, Mols, Murg, and parts of Tannenbodenalp.

[4] The settlements of Murg, Unterterzen and Mols lie along the southern shoreline of the Walensee, overlooked by Quarten and Oberterzen at a slightly higher altitude.

The hamlet of Quinten lies on the north shore of the Walensee, and is only accessible by boat or on foot.

Tannenbodenalp lies some 1,100 metres (3,600 ft) above Unterterzen, forming part of the Flumserberg ski resort, and is split between the municipalities of Quarten and Flums.

Of the rest of the land, 3.5% is settled (buildings or roads) and the remainder (17.2%) is non-productive (rivers or lakes).

Of the foreign population, (as of 2000[update]), 27 are from Germany, 29 are from Italy, 311 are from ex-Yugoslavia, 9 are from Austria, 56 are from Turkey, and 89 are from another country.

[9] The age distribution, as of 2000[update], in Quarten is; 345 children or 12.6% of the population are between 0 and 9 years old and 400 teenagers or 14.6% are between 10 and 19.

Unterterzen has a train station, where (as of 2016) the S4 (circling around the Säntis mountain range) and the IR35 (Bern - Zurich - Chur) stop.

There is also a connecting bus to Walenstadt, giving access to the hourly Zürich-Chur express train service.