Kempraten-Lenggis is a village (Kirchdorf) within the municipality of Rapperswil-Jona, Wahlkreis (constituency) of See-Gaster in the canton of St. Gallen in Switzerland.

It is located on the right-hand (northeastern) shore of Lake Zurich (German: Zürichsee) northerly of Rapperswil on the so-called Kempratnerbucht, literally "Bay of Kempraten".

This natural indentation on the eastern lake shore extends between Feldbach, Hombrechtikon, and Rapperswil on a length of about 3 kilometres (2 mi).

[1][2][3] Among the highlights of archaeological relicts include the Neolithic Seegubel site and La Tène culture body burials which indicates an early settlement.

[4] Beginning in the 1st century AD, the Roman vicus Centum Prata (100 meadows) has been an important Roman settlement to secure the province borders, and was both a stage town on the intersection of the streets to Zürich (Latin Turicum), Winterthur (Vitudurum) via Irgenhausen (Irgenhausen Castrum) and to Chur (Curia Rhaetorum) to Rome's alpine route.

On 1 January 2007 the former municipalities of Rapperswil and Jona merged to form a new political entity: Rapperswil-Jona that became the second largest town in the canton after the capital St. Gallen itself.