Weibern is a municipality in the district of Grieskirchen, in the Austrian state of Upper Austria. It is located in the Hausruckviertel region of the state, in the Alpine foothills north of the Alps.
As a municipality, Weibern is one of the administrative units that make up the Grieskirchen district, which lies in the western part of Upper Austria. The surrounding area is predominantly rural, characterized by farmland and rolling terrain typical of the province.