klettgau is located on the klingengraben and schwarzbach creeks. in the east it borders on the swiss municipalities of trasadingen, wilchingen and wasterkingen. the neighbouring german municipalities are wutöschingen, lauchringen, küssaberg, and hohentengen am hochrhein in the west, as well as dettighofen in the east. there is a border crossing into switzerland on the road from erzingen to trasadingen.