Tübach is a municipality in the Wahlkreis (constituency) of Rorschach in the canton of St. Gallen in Switzerland.

[3] The blazon of the municipal coat of arms is Argent a Bend wavy Azure and in chief sinister a letter T Gules.

Of the foreign population, (as of 2000[update]), 31 are from Germany, 21 are from Italy, 15 are from ex-Yugoslavia, 23 are from Austria, 7 are from Turkey, and 27 are from another country.

[10] From the 2000 census[update], 636 or 60.2% are Roman Catholic, while 276 or 26.1% belonged to the Swiss Reformed Church.

[7] The Capuchin Abbey of St. Scholastika at Schulstrasse 38 is listed as a Swiss heritage site of national significance.

[11] Additionally, the Schlosslandschaft Rorschach / Alter Rhein, a number of castles in a region along the Rhine river, is designated as part of the Inventory of Swiss Heritage Sites.

The Schlosslandschaft is shared between Berg, Goldach, Mörschwil, Rheineck, Rorschacherberg, St. Margrethen, Steinach, Thal and Tübach.