Rudnik (Polish pronunciation: [ˈrudɲik]) is a village in Gmina Hażlach, Cieszyn County, Silesian Voivodeship, southern Poland.

[1] The name of the village is derived from a name of a local stream Rudnik, mentioned as early as 1442 (do potoka jmenem Rudnika), which is a transformation of a word rudy, meaning rdzawy (rusty).

Until recently it was stated that the village was first mentioned in 1566 as Rudnik,[2] however another document exists issued by Wenceslaus III Adam, Duke of Cieszyn on 5 November 1608 which retrospectively affirms another document from 1523 that mentioned the village among others obliged to consume ale produced only in Cieszyn.

[3] At that time the village belonged to the Duchy of Teschen, a fee of the Kingdom of Bohemia, which after 1526 became part of the Habsburg monarchy.

The village is situated on the geographical border between Ostrava Basin in the east and Oświęcim Basin in the west, between roughly 260–280 m (850–920 ft) above sea level, 16 km (9.9 mi) north-west of the Silesian Beskids.