Zawidów [zaˈvʲiduf] (German: Seidenberg; Lower Sorbian: Sydynbórk; Upper Sorbian: Sydnjerka) is a town in Zgorzelec County, Lower Silesian Voivodeship, in south-western Poland, at the Czech border.

The town lies some 14 kilometres (9 mi) south-south-east of Zgorzelec and 139 kilometres (86 mi) west of the regional capital, Wrocław.

[4] In 1635 it passed to the Electorate of Saxony and from 1697 was also under the rule of the Kings of Poland.

As a result of the Thirty Years' War, Protestants from the Czech Kingdom settled there.

[6] After World War II, the town became again part of Poland under the terms of the post-war Potsdam Agreement.