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

Of the rest of the land, 3.7% is settled (buildings or roads) and the remainder (0.6%) is non-productive (rivers or lakes).

[4] The municipality is located in the Toggenburg Wahlkreis in the alpine foothills around the upper Necker river.

It consists of the village of Hemberg and the hamlets of Bächli, Mistelegg, Bomen, Harzenmoos, Brand, Lemberg, Starkenbach, Wis and Unterhemberg.

The blazon of the municipal coat of arms is Per fess dancety Argent and Vert.

Of the foreign population, (as of 2000[update]), 14 are from Germany, 1 person is from Italy, 5 are from ex-Yugoslavia, 3 are from Austria, and 7 are from another country.

[8] The historical population is given in the following table:[3] From the 2000 census[update], 156 or 16.5% are Roman Catholic, while 683 or 72.4% belonged to the Swiss Reformed Church.

[8] The Rotes Haus (Red House) in Bächli on Brugg 693 is listed as a Swiss heritage site of national significance.