Here's an interesting pair of maps. The first is colored in where the percentage of Catholics was highest in 1932. The second is colored in where the Nazi vote was highest in 1932, when Hitler maneuvered his way to power.
The German Catholic population:
And then the Nazi vote.
Source: Erik Maria Ritter von Kuehnelt-Leddihn ""Liberty or Equality".
Reproduced in Scholder Die Kirchen und das Dritte Reich. Bd. 1 und 2: Vorgeschichte und Zeit der Illusionen, 1918 - 1934 (The Churches and the Third Reich, vol. 1: Case History and Time of Illusions). Berlin 1977