Aldersbach (Central Bavarian: Oidaschbo) is a municipality in the district of Passau in Bavaria in Germany.

Not least in the context of tourism, the region bounded by Aldersbach and Fürstenzell is often referred to as Klosterwinkel (Abbey Corner).

The name derives from the name of a person, Althar or Aldar and the Old High German word for a stream: pah or pach.

Aldersbach fell under the financial stewardship of Landshut and the jurisdiction of Vilshofen district court in the Electorate of Bavaria.

As part of administrative reforms in Bavaria, the Community Edict of 1818 led to the formation of the parishes of Pörndorf, Haidenburg and Walchsing, which were incorporated into Aldersbach in 1972.

[4] Since the local elections of March 16, 2014, the town council has been made up as follows: The mayor is Harald Mayrhofer (CSU/Überparteiliche Wählergem.).

Political stability is a hallmark of Aldersbach, reflected in the fact that between 1946 and 2014 the town had only three mayors: From 1946 to 1966 Alfons Duschl held office, followed by Josef Kiermeier until 1990.