Ostermarsch is a district (Stadtteil) of the East Frisian city of Norden, in Lower Saxony.

It is located to the northeast of Norden's city center.

The area of today's district was incorporated into Norden during the Lower Saxony municipal reform in 1972.

[1] The name refers to the location of the polder east from other two of Norden's districts, Westermarsch I and Westermarsch II.

[2] Media related to Ostermarsch (Ort) at Wikimedia Commons