Grudziadz (German Graudenz), city, northern Poland, in Torun Province, on the Wisla (Vistula) River. Situated within a low-lying agricultural region, Grudziadz is an important river port and railway junction. Chief manufactures include agricultural machinery, bricks, ceramics, metals, rubber goods, and timber. Grudziadz was fortified by the Teutonic Knights in the 13th century and received a charter in 1291. In 1466 the city became a Polish possession; it was annexed to Prussia in 1772 at the first partition of Poland. In 1920, after World War I, Grudziadz was included in the reconstituted Polish nation. The city was occupied by Germany from 1939 to 1944, during World War II. Population (1997 estimate) 102,900.