Warthausen (German pronunciation: [ˈvaʁthaʊ̯zn̩]) is a municipality in the district of Biberach in Baden-Württemberg in Germany and birthplace of Friedrich Karl von Koenig-Warthausen.

Included among its neighbourhoods is Oberhöfen, which hosts the Dorfplatz Feschd every year.

Warthausen is located 4 kilometres (2.5 mi) north of Biberach and 38 km south of Ulm.

The municipality Warthausen consists of the main municipality Warthausen with Oberhöfen and Röhrwangen and from the part locations Birkenhard and courtyards with Barabein, Galmutshöfen, Herrlishöfen, Rappenhof and Rißhöfen.

The Warthausen brewery (founded 1632, closed 1970) was known as beer supplier for up to 400 restaurants in Southern Germany.

Since 1985 the palace and estate are owned by Franz Freiherr von Ulm zu Erbach.