Tczew [tt​͡ʂɛf] (Kashubian: Dërszewò; German:  Dirschau (help·info)) is a town on the Vistula River in Eastern Pomerania, Kociewie, northern Poland with 60,279 inhabitants (June 2009). It is an important railway junction with a classification yard dating to the Prussian Eastern Railway (German: Preußische Ostbahn). The city is known for its attractive old town and the Vistula Bridge, or Bridge of Tczew, damaged during World War II.

It is the capital of Tczew County in Pomeranian Voivodeship since 1999, and was previously a town in Gdańsk Voivodeship (1975–1998).

Tczew was first mentioned as Trsow in a document by Duke Grzymisław bestowing the land to the Knights Hospitaller in 1198. In some documents, the name Derszewo appears, which stems from the name of a feudal lord, Dersław. It is unknown whether Trsow and Derszewo referred to the same or two neighboring settlements. By 1252 the settlement was known by the names Tczew and Dirschau, and in 1258 Tczew hosted the first city council in Poland. It received Lübeck rights from Duke Sambor II in 1260. Tczew was purchased by Heinrich von Plötzke of the Teutonic Knights following the Treaty of Soldin in 1309. It was rebuilt from 1364–1384 and granted Kulm law. After the Second Peace of Thorn (1466), Tczew was transferred from the Teutonic Order to the newly-created Polish province of Royal Prussia.