Eichberg is a municipality in the Wahlkreis (constituency) of Rheintal in the canton of St. Gallen in Switzerland.

Of the rest of the land, 9.5% is settled (buildings or roads) and the remainder (0.5%) is non-productive (rivers or lakes).

It consists of the village of Eichberg-dorf and the hamlets of Au, Hölzlisberg and part of Hinterforsts (which is shared with Altstätten).

The blazon of the municipal coat of arms is Argent an Oak branch Vert with three leaves and two acorns.

Of the foreign population, (as of 2000[update]), 43 are from Germany, 10 are from Italy, 58 are from ex-Yugoslavia, 22 are from Austria, and 10 are from another country.

[8] The age distribution, as of 2000[update], in Eichberg is; 217 children or 17.1% of the population are between 0 and 9 years old and 179 teenagers or 14.1% are between 10 and 19.

[4] Out of the total population in Eichberg, as of 2000[update], the highest education level completed by 267 people (21.1% of the population) was Primary, while 423 (33.4%) have completed Secondary, 136 (10.7%) have attended a Tertiary school, and 36 (2.8%) are not in school.

[11] From the 2000 census[update], 542 or 42.8% are Roman Catholic, while 496 or 39.2% belonged to the Swiss Reformed Church.

[8] In 2012, Alex Arnold of the Pirate Party Switzerland ran for mayor of Eichberg, a part-time position.