Hirschbach is a town in the district of Gmünd in Lower Austria, Austria. Hirschbach lies on the Moosbach in the upper Waldviertel, about 15 …Hirschbach is a town in the district of Gmünd in Lower Austria, Austria. Hirschbach lies on the Moosbach in the upper Waldviertel, about 15 km east of Gmünd. About 55.66 percent of the municipality is forested.