Sevelen is a municipality in the Wahlkreis (constituency) of Werdenberg in the canton of St. Gallen in Switzerland.

Of the rest of the land, 7% is settled (buildings or roads) and the remainder (8.6%) is non-productive (rivers or lakes).

It consists of the village of Sevelen and the hamlets of Rans, Oberräfis, St. Ulrich, Välsli, Glaat and scattered farm houses.

The blazon of the municipal coat of arms is Argent a Bend dancety Sable.

Of the foreign population (as of 2000[update]), 94 are from Germany, 156 are from Italy, 509 are from ex-Yugoslavia, 63 are from Austria, 67 are from Turkey, and 180 are from another country.

[8] The age distribution, as of 2000[update], in Sevelen was as follows: 540 children, or 12.7% of the population, were between 0 and 9 years old; and 641 teenagers, or 15.1%, were between 10 and 19.

[11] From the 2000 census[update], 1,275 or 30.0% are Roman Catholic, while 1,865 or 43.9% belonged to the Swiss Reformed Church.

The wettest month is August during which time Sevelen receives an average of 169 mm (6.7 in) of rain or snow.