Wallerstein is a municipality and former principality in the district of Donau-Ries in Bavaria in Germany.

It was first mentioned in 1238 as Steinheim. For generations ruled by the House of Oettingen-Wallerstein, in 1806 Wallerstein became part of the Kingdom of Bavaria by the process of mediatisation. The family still owns the Wallerstein Castle and its surrounding land.

• 1972-2002: Manfred Schürer
• since 2002: Joseph Mayer

• Castle Wallerstein
• Castle rock
• Old Jewish burial ground
• One of only three German Marian and Holy Trinity columns

• 
  Wallerstein, monument (die Pestsäule) and Catholic Parish Church of Saint Alban
• 
  St. Oswald Church

• Yom-Tov Lipmann Heller (1579-1654), born in Wallerstein and later Rabbi of Prague, Nemirow and Krakow. He published a three-volume Mishnah commentary which is studied to this day.
• Louis of Oettingen-Wallerstein (1791-1870), Bavarian statesman and prince
• William Berczy (1744-1813), painter, colonist and architect, co-founder of Toronto
• German General Theodor Busse
• Bernhard Mettenleiter (1822-1901), organist and composer

• Synagogues of the Swabian type (Wallerstein)

• Ludwig Brutscher: Wallerstein. Markt und Residenz. Beiträge zur Orts- und Grafschaftsgeschichte. Markt Wallerstein 1996.

• Official website (in German)
• "Wallerstein, Bavaria: History of the coat-of-arms" (in German). Haus der Bayerischen Geschichte.
• Amtliche Statistik (PDF; 1,3 MB)