Wierzbnik [ˈvjɛʐbnik] (German Herzogswalde) is a village in the administrative district of Gmina Grodków, within Brzeg County, Opole Voivodeship, in south-western Poland.

[1] It lies approximately 8 kilometres (5 mi) north of Grodków, 15 km (9 mi) south-west of Brzeg, and 39 km (24 mi) west of the regional capital Opole.

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