From the Wikipedia page [1]
Rottal-Inn is a Landkreis (district) in the southeastern part of Bavaria, Germany. Neighboring districts are (from the south clockwise) Altötting, Mühldorf, Landshut, Dingolfing-Landau and Passau. To the southeast is the Austrian state Upper Austria (Braunau).
The district was created in 1972 by merging the two previous districts Pfarrkirchen and Eggenfelden and parts of the districts Griesbach and Vilsbiburg.