port city and capital, Zachodniopomorskie województwo (province), northwestern Poland, on the western bank of the Oder River near its mouth, 40 miles (65 km) from the Baltic Sea. Shipbuilding and shipping are the main occupations. Evidence suggests that the area was first inhabited by seafaring people 2,500 years ago.

In the 8th and 9th centuries Szczecin was a Slavic fishing and commercial settlement in Western Pomerania (Pomorze Zachodnie). During the 10th century it was annexed to Poland by Mieszko I. It was granted municipal autonomy in 1243 and remained capital of the dukedom of Western Pomerania. It grew and prospered, joining the Hanseatic League in 1360. In 1637 it passed to the Brandenburg Electorate, which controlled it until 1648, when it was seized by the Swedes. In 1720 it passed to Prussia and remained under German control until its transfer to Poland after World War II.

Modern development of the port of Szczecin began in 1826 with regular navigation of the Oder. The port grew steadily until World War II, mainly through its proximity to Berlin, 90 miles (145 km) to the southwest. In 1926–27 the channel through the Szczeciński Lagoon to the outport of Świnoujście (Swinemünde) was deepened. During World War II the port was completely destroyed and the city itself was greatly depopulated. Under Polish administration the port and city were rebuilt.

Szczecin is, with Świnoujście, now Poland's largest port complex, handling some 6,000 ships annually in the early 1990s. It is an important port for cargo shipped down the Oder from the Czech Republic, Hungary, and Germany; coal is the major export. Other industries, in addition to shipbuilding, include food processing, metalworking, fertilizer production, and synthetic-textile-machinery manufacturing. Power for these industries and for the northwest of Poland is supplied by the Dolna Odra power plant.

Szczecin is a cultural centre of western Poland, having four institutions of higher education, several theatres, a philharmonic orchestra, libraries, and the National Museum. It is a picturesque city containing many monuments, parks, and small lakes. The Castle of the Dukes of Pomerania, built in the Renaissance style, was reconstructed after incurring heavy damage during World War II. It features five main wings and two towers. The Tower of the Seven Cloaks, a remnant of Szczecin's medieval town walls, can be viewed from the castle balcony. Pop. (2002) 415,399.