Waldenstein is a town in the district of Gmünd, in the Austrian state of Lower Austria. It lies in the northwestern part of the country, within the Waldviertel region that borders the Czech Republic.
The municipality is one of the smaller communities of the Gmünd district, a largely rural area of Lower Austria characterised by rolling hills, forests and farmland. Like other settlements in the district, it is administered as an ordinary Austrian municipality and is connected to the surrounding area by regional roads.
Details of its history, population and landmarks are limited in the available sources; the town is chiefly identified by its administrative position within the Gmünd district of Lower Austria.