After World War II, the border was drawn from Świnoujście in the north at the Baltic Sea southward to the Czech Republic (then part of Czechoslovakia) border with Poland and Germany near Zittau. It follows the Oder–Neisse line of the Oder (Odra) and Neisse (Nysa) rivers through most of their course.

The Oder–Neisse line (German: Oder-Neiße-Grenze, Polish: granica na Odrze i Nysie Łużyckiej) is an unofficial term for the modern border between Germany and Poland. The line generally follows the Oder and Lusatian Neisse rivers, meeting the Baltic Sea in the north.

The Oder is 840 kilometres (522 miles) long: 112 km (70 miles) in the Czech Republic, 726 km (451 miles) in Poland (including 187 km (116 miles) on the border between Germany and Poland). It is the third longest river located within Poland (after the Vistula and Warta); however, it is the second longest river overall taking into account its ...

For a distance of 116 miles in its middle reach, it constitutes the boundary between Poland and Germany before reaching the Baltic Sea via a lagoon north of the Polish city of Szczecin. The river is an important waterway, navigable throughout most of its length.

For the first 70 miles (112 kilometres) from its source, it flows through the Czech Republic. For 116 miles in its middle reaches, it forms the border between Poland and Germany, before emptying into the Baltic Sea via a lagoon north of the Polish city of Szczecin.

The Oder River (German: Oder; Czech/Polish: Odra) is a river in Central Europe. It starts in the Czech Republic and flows through Poland and Germany. It forms 187 kilometers of the border between Poland and Germany. The river is 854 kilometres long and ends in the Szczecin Lagoon in the Baltic Sea.

From the confluence of the Lusatian Neisse river to the dividing into Western Oder and Eastern Oder, it marks the border between Germany and Poland (163 km). Like other large rivers, the Oder has played a key role in the lives of the people living in its neighbourhood.

Neisse River, either of two rivers now in southwestern Poland (until 1945, in Germany). The better-known Nysa Łużycka, or Lusatian Neisse, is the longer (157 miles [252 km]) and more westerly; it forms part of the German-Polish frontier (see Oder–Neisse Line).

The Oder River carries its waters through the Czech Republic, Poland and Germany. From its second largest tributary Nysa Łużycka (Neisse) to the Polish town of Gryfino, it serves as the border between Poland and Germany. The second longest river in Poland, the Oder is second only to the Vistula.

Oder River, or Odra River ancient Viadua, River, east-central Europe. It flows from its source in the Hrubý Jeseník Mountains in the Czech Republic north through western Poland, where it forms the boundary between Poland and Germany.