Gaienhofen is a town in the district of Konstanz in Baden-Württemberg in Germany. It is located at the border with Switzerland.
Since 1974, Gaienhofen consists of four villages: Gaienhofen, Gundholzen, Hemmenhofen and Horn. Attractions, apart from the Lake of Constance, include the Hermann-Hesse-Höri-Museum and the Museum Haus Dix.