Preußisch is the German language adjective for "Prussian".
Preußisch may refer to:
Places in Germany Preußisch Oldendorf, town in North Rhine-Westphalia
Places outside of Germany Preußisch Eylau, now Bagrationovsk, Russia Preußisch Friedland, now Debrzno, Poland Preußisch Holland, now Pasłęk, Poland Preußisch Stargard, now Starogard Gdański, Poland
Other things Neue Preußische Zeitung, German newspaper Preußisches Herrenhaus, Prussian House of Lords Preußische Treuhand, German expellee company