The municipality was part of the Unterrheintal District, but in 2004 became part of the Rorschach Wahlkreis. It is located between the Appenzell foothills, the Buchberg and Lake Constance. It consists of the haufendorf village (an irregular, unplanned and quite closely packed village, built around a central square) of Thal and (since 1803) the villages of Altenrhein, Buechen, Buriet, Staad and a number of scattered hamlets.
