Achstetten (German pronunciation: [ˈaxʃtetn̩]) is the northernmost municipality in the district of Biberach, in the region of Upper Swabia in Baden-Württemberg, Germany.

It is a relic of a route leading from Konstanz via Meersburg towards Ulm and then further via Heidenheim to Aalen and Würzburg, terminating at Fulda.

He transferred his possession to his nephew Julius Cäsar Reuttner von Weyl, who, in 1802, bought the rights of the revenue from the complete tithes from Ochsenhausen Abbey.

On 1 March 1972, the formerly independent municipality of Oberholzheim was incorporated into Achstetten, followed on 1 November 1972 by Bronnen and on 1 January 1975 by Stetten.

The red and silver banderole is a reminder of the Cistercian abbey in Gutenzell with whom the Freiherrn of Freyberg shared authority over the village from 1447 onwards.

The monastery of Ochsenhausen had the church St Oswald and Agatha built in Renaissance-style in 1625, replacing a late mediaeval structure at the same location.

Following the acquisition of Achstetten by the Counts of Reuttner von Weyl in 1795, the chapel has been used as the final resting place for members of that family.

The structure of the chapel is marked by flat wall-pillars on the interior as well as the exterior, a semi-circular choir and a pointed-topped spire.

The original castle was burnt down in 1525 during the German Peasants' War after the Baltringer Haufen had stormed the building.

The present building was erected at the beginning of the 18th century and continued to serve as a country inn until 2008 when it was converted into individual flats.

In 2010, the designation of the building was changed when the local council approved plans by developers to establish a hostel for travelling tradesmen on the premises.