Niederbüren is a municipality in the Wahlkreis (constituency) of Wil in the canton of St. Gallen in Switzerland.

Of the rest of the land, 8.6% is settled (buildings or roads) and the remainder (1.2%) is non-productive (rivers or lakes).

It consists of the village of Niederbüren on the right bank of the Thur and hamlets in the neighboring hill country.

The blazon of the municipal coat of arms is Per fess Azure a Beehive Or with Bees and Argent three Bends Gules.

Of the foreign population, (as of 2000[update]), 8 are from Germany, 2 are from Italy, 39 are from ex-Yugoslavia, 8 are from Austria, 10 are from Turkey, and 21 are from another country.

[8] The age distribution, as of 2000[update], in Niederbüren is; 255 children or 18.0% of the population are between 0 and 9 years old and 236 teenagers or 16.7% are between 10 and 19.

[8] The historical population is given in the following table:[3] The Textile Museum in Sorntal and the house at Staatsstrasse 35 are listed as Swiss heritage sites of national significance.

[12] From the 2000 census[update], 954 or 67.5% are Roman Catholic, while 255 or 18.0% belonged to the Swiss Reformed Church.