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

Of the rest of the land, 4.2% is settled (buildings or roads) and the remainder (0.5%) is non-productive (rivers or lakes).

[4] The municipality is located in the Toggenburg Wahlkreis between the Thur and Necker valleys.

It consists of the village of Oberhelfenschwil and the hamlets of Wigetshof, Oberwil, Metzwil, Wasserfluh, Rennen, Winzlisau, Utenwil, Schwanden and Füberg.

Of the foreign population, (as of 2000[update]), 14 are from Germany, 7 are from Italy, 84 are from ex-Yugoslavia, 3 are from Austria, 19 are from Turkey, and 69 are from another country.

[8] The age distribution, as of 2000[update], in Oberhelfenschwil is; 253 children or 17.4% of the population are between 0 and 9 years old and 239 teenagers or 16.4% are between 10 and 19.

[4] Out of the total population in Oberhelfenschwil, as of 2000[update], the highest education level completed by 321 people (22.0% of the population) was Primary, while 415 (28.5%) have completed their secondary education, 120 (8.2%) have attended a Tertiary school, and 68 (4.7%) are not in school.

[11] From the 2000 census[update], 569 or 39.1% are Roman Catholic, while 566 or 38.9% belonged to the Swiss Reformed Church.