Sankt Kathrein am Hauenstein is a municipality in the district of Weiz, in the Austrian state of Styria. It is located in the eastern part of Styria, within the Weiz district, which lies in the broader Alpine foothills region of southeastern Austria.
As a municipality, Sankt Kathrein am Hauenstein is one of the smaller administrative units within the Weiz district, a district that comprises a number of towns and villages in this part of Styria. The community's name derives from Saint Catherine, with "am Hauenstein" referring to its local geographic setting.
Like other municipalities in the region, Sankt Kathrein am Hauenstein forms part of the administrative and cultural landscape of eastern Styria, an area characterized by its rural settlements and Alpine foothill terrain. The municipality is represented in Austrian statistics and administrative records as a distinct entity within the Weiz district.