Gaissau, Vorarlberg, municipality in the district of Bregenz, alt. 399 m, pop. 1,160, area 5.32 km2, situated in a bend of the Old Rhine, close to the Swiss border. - Customs post, mission house of the St. Josef Monastery; production of coatings. In the vicinity characteristic reed belt of the Rhine delta (nature preserve and bird sanctuary).
Literature#G. Niederer, Gaissau. aus der Geschichte eines Grenzdorfes, 1962.