Bütschwil is a former municipality in the Wahlkreis (constituency) of Toggenburg in the canton of St. Gallen in Switzerland.

Of the rest of the land, 12.4% is settled (buildings or roads) and the remainder (1.5%) is non-productive (rivers or lakes).

On the left bank of the Thur, it consists of the linear villages of Bütschwil and Dietfurt and the hamlets of Grämigen, Tierhag, Feld, Kengelbach and Zwiselen.

The blazon of the municipal coat of arms is Gules, two Swans' Heads proper couped and interwoven.

Of the foreign population, (as of 2000[update]), 28 are from Germany, 83 are from Italy, 318 are from ex-Yugoslavia, 5 are from Austria, 165 are from Turkey, and 65 are from another country.

[7] The age distribution, as of 2000[update], in Bütschwil is; 482 children or 13.6% of the population are between 0 and 9 years old and 605 teenagers or 17.0% are between 10 and 19.

[7] The historical population is given in the following table:[2] The village of Bütschwil is designated as part of the Inventory of Swiss Heritage Sites.

[11] From the 2000 census[update], 2,404 or 67.7% are Roman Catholic, while 471 or 13.3% belonged to the Swiss Reformed Church.