Olza (river)

The Olza (Olše, Olsa) is a river in the Czech Republic and Poland, a right tributary of the Oder River. It flows through the Silesian Voivodeship in Poland and through the Moravian-Silesian Region in the Czech Republic. It is 89.1 km (55.4 mi) long. The river forms a significant part of the Czech-Polish state border.

Flows through: Poland.

River data from Wikidata (CC0); lengths normalised to a common unit.