Ostsee Zeitung German Newspaper (also known as OZ) is a German language regional daily newspaper published in Rostock, Germany.

Ostsee-Zeitung was one of the newspapers published in East Germany before the unification. The paper belonged to the Socialist Unity Party during this period.It is based in Rostock and is published in Rheinisch format.

Ostsee-Zeitung was part of the Ostsee-Zeitung GmbH, a subsidiary of the Axel Springer group, until 2008.The group acquired the shares in the paper in 1990.Lübecker Nachrichten GmbH, a subsidiary of the Madsack group, bought the paper in February 2009.The Madsack group also owns Freie Presse, Göttinger Tageblatt, Hannoversche Allgemeine Zeitung, Kieler Nachrichten, Leipziger Volkszeitung, and Lübecker Nachrichten.

The publisher of Ostsee-Zeitung is the Ostsee Zeitung publishing house.The paper has ten local editions.

People living in the Neue Bundeslander regard Ostsee-Zeitung as part of their identity.

The circulation of Ostsee-Zeitung was 232,100 copies in the mid-1990s before the unification.In 2001 the paper had a circulation of 191,000 copies. Its circulation was 181,046 copies in the second quarter of 2003.