Windigsteig is a municipality in the district of Waidhofen an der Thaya, in the Austrian state of Lower Austria. It lies in the northwestern part of the state, within the Waldviertel region near the border with the Czech Republic.
The municipality is administratively part of the Waidhofen an der Thaya district, one of Lower Austria's five districts in the Waldviertel. Like other communities in the area, it is a small, rural municipality composed of a main village and several outlying hamlets and scattered farmsteads.
The surrounding landscape is typical of the Waldviertel: gently rolling hills, farmland, and woodland, at a relatively high elevation compared with much of Lower Austria. The area is served by regional roads connecting it to the nearby town of Waidhofen an der Thaya.