Kozy [ˈkɔzɨ] (German: Seiffersdorf, Seibersdorf, Kosy (1941–45); Wymysorys: Zajwyśdiüf)[2] is a large village with a population of 12,457 (2013) within Bielsko County, located in the historical and geographical south-west region of Lesser Poland, between Kęty and Bielsko-Biała, and about 65 kilometres south-west of Kraków and south of Katowice.

Although Kozy was in the Kingdom of Poland, the village community were mostly German-speaking, embraced the Protestant Reformation, and would thus come under persistent attack from the Catholic Church during and after the Counter-Reformation.

[2] In the late 18th-century, the subsequent new village owners Jordanów, an affluent Polish burgher family from Kraków, started a strong local persecution of Protestants.

[8] In response, an exodus resulted, 64 families and 360 individual refugees with their belongings, crossed north-west from Kozy over the border at Dzieditz (Czechowice-Dziedzice) into Prussia controlled Upper Silesia, on the night of 25 April 1770, and there founded the village Anhalt (Holdynow/Hołdunów) near Pleß (Pszczyna).

[2][8] The escape route was secured by a Prussian Army cuirassier cavalry squadron escort under General Friedrich Wilhelm von Seydlitz; the resettlement was supported by the King of Prussia, Frederick the Great, who asked only whether the refugees from Poland understood German.

[8] During the 19th-century, Kozy revived once again as one of the most affluent villages of Oświęcim Land, famous for its skilled stonemasons, carpenters and loom weaving cloth makers.

[11] In the Second Polish Republic (1918), the lands of Oświęcim and thus Kozy, were reincorporated into Poland's Kraków Voivodeship at the end of World War I.

During World War II, it was a local centre for the Polish resistance Armia Krajowa (Home Army).