Ostmark

is a German term meaning either Eastern march when applied to territories or Eastern Mark when applied to currencies.

Ostmark may refer to:

• the medieval March of Austria and its predecessors Bavarian eastern march and March of Pannonia in a post-19th century usage
• the medieval Saxon Eastern March east of the Elbe River
• the eastern regions of the Prussia acquired in the partitions of Poland, mainly the Province of Posen
• Ostmark (Austria), Austria's name when it was part of Nazi Germany
• Ostmark was a Gau of the Nazi Party, composed of the Prussian province Posen-West Prussia and eastern parts of Brandenburg

Ostmark may refer to the following historical currencies:

• East German mark or Mark of the German Democratic Republic, the East German currency before 1990
• German ostmark, short-lived currency used in eastern areas occupied by Germany in 1918

See also

• German Eastern Marches Society
• Army Group Ostmark