The Drwęca (Polish: [ˈdrvɛnt͡sa]; German: Drewenz; Lithuanian: Druvinčia) is a river in northern Poland.

It becomes a tributary of the Vistula river near the city of Toruń, forming a part of the city's administrative boundary.

It has a length of 231 km and a basin area of 5,697 km2, all in Poland.

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