The Altdorf Forest (German: Altdorfer Wald) is a forested, low mountain ridge between Aulendorf and Vogt in the county of Ravensburg in the German state of Baden-Württemberg. It is up to 776.6 m above sea level (NHN) high.

The forest has an area of about 82 km and is thus the largest contiguous forest in Upper Swabia. It is divided into state, municipal and private forests, of which the aristocratic House of Waldburg-Wolfegg owns the largest area.

• Anton Huber: Beiträge zur Geschichte des Altdorfer Waldes. Staatliches Forstamt, Ravensburg, 1998
• Jochen Jauch: Geschichte und Geschichten aus dem Altdorfer Wald. Von der Försterei Gambach zum Forstrevier Bergatreute. Eppe, Bergatreute, 2012, ISBN 978-3-89089-153-8
• Volker Kracht (ed.): Die Naturschutzgebiete im Regierungsbezirk Tübingen. 2nd edition. Thorbecke, Ostfildern, 2006, ISBN 978-3-7995-5175-5 (includes coverage of the few nature reserves in the Altdorf Forest)
• J. D. G. von Memminger: Der Altdorfer Wald, in: Beschreibung des Oberamts Ravensburg. Cotta, Stuttgart and Tübingen, 1836 (e-text and digital version at Wikisource)
• Der Altdorfer Wald, in: Allgemeine Forst und Jagdzeitung, 9th annual issue, 1840, pp. 424ff. (digitalised)

• 3202 Altdorfer Wald, landscape fact file by the BfN