Norrköping, city, southeastern Sweden, in Östergötland County, on the Bråviken (an inlet of the Baltic Sea), near Stockholm. It is an important seaport, accessible to oceangoing vessels via the Lindö Canal (completed 1961), and one of Sweden's principal commercial and manufacturing centers. Textiles, chemicals, paper, electrical equipment, and furniture are major manufactures. Hedvig's Church (1675) is a historic landmark here. Norrköping was established about 1350 and became a textile center in the 17th century. It was badly damaged by fire in 1719. Population (1998 estimate) 122,415.