Altenstein (German for "Old Rock" or "Old Stone") may refer to:
Places in Germany Villages and administrative areas Amt Altenstein, an Amt in the Duchy of Saxe-Meiningen Altenstein, village in the municipality of Asbach, Rhineland-Palatinate, Germany Altenstein, village in the municipality of Häg-Ehrsberg in the county of Lörrach, Baden-Württemberg, Germany Altenstein, village in the market town of Maroldsweisach, county of Haßberge, Bavaria
Castles Altenstein Castle (Bad Liebenstein), historical castle site near Schweina and Bad Liebenstein, Wartburgkreis, Thuringia Altenstein Castle (Southern Black Forest), lost castle near Häg-Ehrsberg, Lörrach, Baden-Württemberg Altenstein Castle (Lower Franconia), castle ruins in Altenstein between Ebern and Maroldsweisach, Haßberge, Bavaria Altenstein Castle (Eichsfeld) in the vicinity of Asbach-Sickenberg near Bad Sooden-Allendorf, Eichsfeld, Thuringia Alte Burg (Altenstein), early medieval ringwork between Altenstein and Lichtenstein, Maroldsweisach, Haßberge, Bavaria Ringwall Altenstein, lost castle near Taunusstein-Hahn, Rheingau-Taunus-Kreis, Hesse
Other places in Germany Altenstein (Bad Liebenstein), a quarter of Bad Liebenstein in Wartburgkreis, Thuringia, Germany, with the: Altensteiner Park Altenstein Palace
Other places Altenstein (Namibia), a municipality in Namibia
People Bernd Altenstein (born 1943), German sculptor Karl vom Stein zum Altenstein (1770−1840), Prussian politician