Louky nad Olší  (Polish: Łąki nad Olzą , German: Lonkau) (literally, "meadows upon Olza") is a village in the Karviná District, Moravian-Silesian Region, Czech Republic, since 1975 administratively a part of the city of Karviná as Louky, formerly a separate municipality. It lies on the left bank of the Olza River, in the historical region of Cieszyn Silesia.