Żerków ([ˈʐɛrkuf]; German: Zerkow, 1943–1945 Bergstadt (Kr. Jarotschin)) is a town in Jarocin County, Greater Poland Voivodeship, Poland, with 2,076 inhabitants (2004). It is located 53 kilometers east of the regional capital of Poznań. The town is near the Żerków-Czeszewo Landscape Park.