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

Of the rest of the land, 7% is settled (buildings or roads) and the remainder (3%) is non-productive (rivers or lakes).

[3] The former municipality is located in the Toggenburg Wahlkreis in a high plateau between the Thur and Neckar rivers.

It consists of the village of Ganterschwil and the hamlets of Äwil, Anzenwil, Bleiken, Ötschwil and Tobel as well as scattered individual farm houses.

The blazon of the municipal coat of arms is Or on a Base Vert a Woodpecker of the same and in chief sinister a Mullet Sable.

Of the foreign population, (as of 2000[update]), 7 are from Germany, 12 are from Italy, 30 are from ex-Yugoslavia, 5 are from Austria, 1 person is from Turkey, and 16 are from another country.

[3] Of the companies with operations in Ganterschwil, Berlinger & Co. AG, a family-owned company with significant product lines of temperature monitoring technologies use by pharmaceutical, chemical, cosmetic, and other industries, and of standardised doping control systems used in testing animal and human fluids (urine, blood), has received attention for providing the sample collection kits and related items for the Sochi winter olympics.

[12] From the 2000 census[update], 603 or 54.3% are Roman Catholic, while 398 or 35.8% belonged to the Swiss Reformed Church.