Ostmark

Ostmark may refer to:


 * Margraviate of Austria, later known as Ostmark
 * Saxon Eastern March, a march of the Holy Roman Empire from the 10th to 12th century
 * Ostmark (Austria), Austria's name when it was part of Nazi Germany
 * Ostmark, a Gaue of the Nazi Party
 * East German mark, the currency of the former German Democratic Republic
 * German ostmark, short-lived currency used in eastern areas occupied by Germany in 1918